larva only, 145.

Achatina clavàta described, 487.

Acheróntia A'tropos, erratic habits of, 187.
Actiniæ, observations on the habits of, 474.
Aeólodon, description of, 287.

Africa, expedition into the interior of, 98; enu-
meration of the objects in natural history
collected by the exploring party, 102.
Alcyonium digitatum, description of, 475.
Aluco stridula, changes of plumage, 306.
Alý sum calycinum, sudden appearance of in a
particular locality, 447.

Ancistrócerus, characters of the group, 491.
Anemonal curves, observations on, 211.
Animal life, compared with vegetable, 28.
Anóstoma (new gen is in entom.), 143; A. aus-
tralasiæ figured and described, 143; A. Herbstii
figured, 144; observations upon, 485.
Antennæ of insects, observations on, 257.
Apes, tossil remains of, 437.
Argonaut, experiments of Mrs. Power upon the
shell and eggs of, detailed, 394; description of
the Octopus when just hatched, 395; obser.
vations of Mr. Smith upon the animal and its
shell, 396; opinion of Mr. Gray respecting
the nucleus of the shell, 397; experiments of
Captain Rang upon the shell, 397; position
of the Ocythöe with respect to the shell, 398;
description of the manner in which the Ocy-
thöe crowls along the bottom of the sea, 399;
obser.ations of Mr. Cranche upon, 530; ob-
servations upon fractured specimens repaired
with true shell, 527; on the parasitic nature
of the animal, 247.

Armadillo, specimen stolen from the Zoological
Gardens, 434.

Athalia centifoliæ, subject of a prize essay, 547.
Atractodon élegans figured and described,

219.

Aurora, notices of, 221. 633. 685. 697.

Ballard Head, geological observations upon the
chalk of, 414.

Basalt, experiments upon the fusion of, 147.
Bear, fossil remains of, 125.

Bees, migrative impulse displayed, 134.
Belemnita-Madrepora, 161.

Bettóngia penicillata, rufescens, setòsus, de-
scribed, 584.

Bétula álba, observation upon, 447.
Bimana, characters of, 525.

Birds, genera and species of indicated by their
nests, 4; late singing of, 53; list of those
found in Devonshire, 113; list of the rarer
species killed in Suffolk and the borders of
Norfolk and Essex, 116.

Black Jack caterpillar. See Athalia centifoliæ.
Black-throated loon, changes of plumage, 301.
Blue Skate, capture of an immense specimen,

435.

largement of its eggs, 247.

Calamophilus biármicus, variation of plumage,

303.

Canis procyonöldes (raccoon-faced dog) de-
scribed, 578.

Capercailzie, formerly known in Scotland,

119.
Carcharias megálodon, occurrence of the fossil
teeth in the crag, 225.

Cássida obsolèta, remarks relating to, 976.
Cássis, distinctions between it and Cypræcássis,
214; testiculus, animal of, figured and de
scribed, 472.

Cat captures a swallow by feigning death, 5;
instance of its sagacity in discovering its
home, 133.

Centènus variegatus described, 581.
Chalk, sections of, on the Dorsetshire coast,
417.

Chatura pelásgica, limited geographical range,
187.

Chaffinch, changes of plumage noticed, 132.
Chaunonotus Sabínii described, 487.
Cheirópoda, characters of, 525.
Chimpanzee, its innate dread of the large Fèles,
quoted in relation to instinct, 2.
Chiton, fossil, described, 162.
Cinnabar, notice of a large specimen, 157.
Circus cineraceus, changes of plumage, 302.
Colour, on the changes of in the fur of Mam.
malians and the feathers of birds, 259.
Colúmbidæ improperly placed beside the Ra-
sòres, 529.

Colýmbus glacialis, changes of plumage, 306.
Conepatus Humboldtii described, 581.
Congèria. See Mytilus polymorphus.
Corrosive solution, valuable in the preservation
of botanical specimens, 311.

Corvus Córnix, occurrence of black varieties, 81;
its pairing with the black crow, 82.

Cows, statistics relating to the births of the
sexes, 84.

Crag, fossils of, 35. 90. 218. 225.
Crocodile, fossil, figured, 532.

Crossbill, notes on the habits of, 164; remark-
able dissimilarity in the plumage, 165.
Crow, carrion, on the habits of, as observed in
Scotland, 118.

Crow, Royston, on the habits of, as observed in
Scotland, 118.

Cùbla, observations upon, 488.

Cuckoo, observation upon, 554.
Currùca cinèrea. See Whitethroat.
Cylindrodes (new genus in entom) 141; Camp.
béllii figured and described, 142.
Cynógale Bennéttii described, 579.
Cynthia cárdui, extensive geographical range,
137.

Cypræcássis, characters of the genus, 211; dis-
tinctions between it and Cypræa, 215; notice
of the habits of the animal, 216; additional
observations upon, 431; additional remarks
by M. Stutchbury, 470; objections to the
admission of the genus, 367. 387.
Death, simulation of, remarks upon, 508.
Deposits, semi-tertiary, 161.

Deposits, tertiary, divided zoologically into
three groups, 12; elevation of, 13; on the
errors which may arise in computing their
relative age by the percentage test, 235.
Dictamnus álbus, supposed electrical proper-
ties, 241.

Didelphidæ, characters of, 525.

Divergence in vegetables, letter from Golding
Bird on, 181.

Diary of a Naturalist, extracts from, 157.

Dog, remarks upon the organ of time in, 53.
Dreissèna cyanea. See Mytilus polymorphus.
Dromedary, birth of one at the gardens of the
Zoological Society, 548.
Duck, changes in plumage, 262.
Dumfriesshire snake, existence, as distinct from
the common viper, doubted, 187.
Eagle, instance of its choosing an inaccessible
spot to build in, 119; nest of in Loch Skene,
443.

Electric currents in vegetable structures, 240.
Electrical phenomenon, 220.

Elephant, anecdote of the recapture of a tame
individual, 8; fossil remains of, 125.
Endosmosis, explanation of the term, 59.
Epizooty, its effect, 134.

Exosmosis, explanation of the term, 59.
Falco cyaneus. See Ring-tailed Glede.
Farringdon, sponge-bed noticed, 237.
Fèdia carinata, locality for, 439.

Felis chinénsis, inconspicua, pulchella, ornata,
described, 577.

Felspar, experiments upon the fusion of, 147.
Fieldfares breeding in Scotland, 339.
Fox, instances of its feigning death, 5; ob-
servations on the natural habits of, 509.
Fringillidæ, description of a new form belong.
ing to, 535.

Geese, wild, protected in Loch Naver, 120.
Geosaúrus, description of, 290.

de.

Germination, on the electric currents
veloped in, 243; physiological and chemical
changes proper to, 293.

Gibbon. See Apes.
Gironde, basin of, 14.
Gliridæ, characters of, 525.

Gnáthodon figured and described 376.
Golúnda Ellioti; Meltàda, described, 586.
Goldfish, manner of taking their food, 45.
Granite, experiment upon the fusion

147.

of,

Gravel, character of, in Norfolk and Suffolk,

145.

168.

House-sparrow, fact relating to the habits of,
Hybridism, remarks on, 81. 358.
Hyères, description of its position, and general
character of the place, 194; botany of, 193;
orangeries of described, 194; islands of, 196;
insects collected there, 198.
Hypsiprýmnus minor described, 584.
Ichthyosaurus, description of, 342.

Icones Plantarum, notice respecting the co-
louring the plates, 385.

Idiocy, existence of, in sheep and poultry, 189.
Iguanodon, description of, 341.

Ignis fatuus, remarks on its origin, 548. 551, 552;
supposition that it is an insect, 3 3.
Impatiens Balsamina, irritability in the valves
of the seed-vessel, 58. 61.

Infant instinctively takes the breast, 3.
Instinct, definition of, 1.

Irritability shown in the stems of many plants
when divided, 57; attempt to explain it by
physical causes, 58. 62.

Jackdaw, changes of plumage, 301.
Jack-o'-lantern. See Ignis fatuus.

Jersey, notices of rare plants collected there, 25;
general character of the island, 26.

Kangaroo, description of the membranes of a
fœtus, 481.

Kingfisher, manner of taking its food, 48.
Kent, degradation of the coast noticed, 123;
action of the tides upon, 124.

Lacérta Neptunia, description of, 292.
Lagopus salicèti, changes in the plumage of, 262.
Lamium álbum, experiments upon the irrita.
bility of, 59; intermèdium, locality for, 439.
Laniada, remarks upon, 487.

Lanius Collùrio, changes of plumage, 300.
Larks, plumage often varying according to the
soil, 135.

Lárus argentatus, changes of plumage,
Leggada Booduga described, 586.
Lemúridæ, characters of, 525.
Lepidosaurus, description of, 291.
Leptonyx Weddéllii described, 582.

Lepus californicus, Douglasii, longicaudatus,
described, 586.

Leucojum vérnum, observation upon, 447.
Lima, observations on its mode of progression,
23; description of the animal, 24; queries
respecting its affinities, 24.

Linnets, female, assuming the male plumage,
480.

Lithódomus dáctylus, manner of procuring it
in the harbour of Malta, 23.

Lizard, notice of an undescribed variety, 189.
Locústa monstròsa. See Anóstoma Herbstii,
See Crossbill.
Lóxia cuviróstra.
Luminous appearance at Birmingham, 222.
Lunar hornet sphinx. See Trochilium crabroni.
fórmis.

Lutra califórnica, chinensis, índica, described,

580.

Lutrària figured and described, $74.
Macropus major Shaw, described, 582.
Macrospondylus, description of, 291.
Máctrada, arrangement of the family, 335.
Máctra figured and described, 371.
Madrépora Caryophillia, on the habits of, 475.
Mailed gurnard captured off Plymouth, 17.
Malaconòtus noticed, 488.

Mallard, mode of changing plumage, 260.
Mammalia, fossil remains of, noticed on the
Kentish Coast, 122.

Man, comparison of his intellectual powers with
those of animals, 78.

Manticora latipénnis described and figured,

the society, 55.

Metriorhynchus, description of, 352.

Phoca plátythrix described, 582.
Phytosafirus, description of, 348.

389.

Mecistùra vàgans. See Bottletit.

Migrative instinct, observations on, 131; occurs
among Mammalia and reptiles, 133.
Minnows found in the River Don, in Scotland,
340,

Molasses, organic contents of, 237.
Muirhen. See Red Grouse.

Momórdica Elatèrium, irritability in the peri-
carps of, 58.

Mosasaurus, description of, 347.

Motacilla flava, see yellow wagtail; M. lugubris,
distinctions between it and M. álba, 460; Yar-
rélli described, 460.

Mulínia figured and described, 375.
Museum, Ashmolean, history of, 270; Dover,
history of, 275; Paris, censures upon the
management of, by Raspail, 104.

Music of snails, explanation of the phenomenon,

107.

Nomenclature, rules for, 173; observations
on, 169; observations on, by Zetetes,421.
Oak, observations upon the purposes to which
the wood, bark, and fruit is applied, 75.
Ocýthöe. See Argonaut.

Odynèrus, characters of the group, 494.
Ophiura bracteata and neglécta, 476.
O'plopus la vipes described, 495; record of
the capture of a British species, 491.
Orang, living specimen of, 648.
Ornithorhynchus, derivation of the name, 50.
Ortolans alive in the London markets, 441.
O smia leucomelana, notice of its capture, 490;
description of its habits, 492.

Oxydulous Copper, occurrence in detached
cubes, 168.

Pachydermata, fossil, temperature of the Paris
basin deduced from, 15.

Palm squirrel, observations upon, 496.
Papilio Podalirius, notice relating to its occur-
rence in Britian, 333.

Paradoxùrus, arrangement of the species of
the genus, 578, 579; Derbyànus, Jourdanii,
leucomýstax, musangöldes, quinquilineàtus
Zebra, 579.

Parasites, human, their occurrence on man no
absolute proof of their non-existence else-
where, 85.

Partridge, white, shot near Birmingham, 52.
Partridges, when only just hatched, squat if
alarmed, 6.

Pedimana, characters of, 525.
Pemphrèdon lugubris, mandibles of figured,
318; remarks upon the type of the genus,
170; discussion respecting the original type
of the genus, 249.

Percentage system, objections against its intro-
duction, 35. 90. 123.

Petrógale penicillatus described, 583.

Phenomena, natural examples of, 230.

Plerophásmata, objections to M. Serville's ar-
rangement, 144.

Plesiosaurus, description of, 345.
Pleurosaurus, description of, 290.
Plover, golden, manner of moulting, 261.
Polyómmati, rare occurrence of in the larva
state noticed, 19.

Polyómmatus Artaxerxes, observations on,
275.

Porphyry, experiments upon the fusion of, 147.
Procyon nívea described, 580.
Proteus, on the habits of, 625,
Protosaurus, description of, 292.
Ptarmigan, changes of plumage, 261.
Ptérocles, genus, presumed affinity to the pi
geons, 442.

Ptéromys albivénter, Leáchii, melandtus, de-
scribed, 584.

Pteronùra Sambachii described, 580.
Purple hairstreak. See Thecla quércus.
Purre, difference in the dimension of bill of,
480.

Pyrgoma ánglicum, cbservation upon, 475,
Pyrrhula vulgaris, egg of, found fresh laid in
November, 53.

Quadramana, characters of, 525.
Quicklime, useful in the preservation of zoo.
logical specimens, 223.

Quinary system treated of, 327.

Rat, mention of its placing its neck against the
wall, to avoid the bite of the ferret, 2.
Redwing's breeding in Britain, 439.
Rhacheosaurus, description of, 289.
Rhea Darwinii, previously described, 504.
Rhinoceros, three species in the South African
collection, 333; fossil remains of, 125.
Ring-tailed glede, instance of the eggs being
removed by the parent bird, 122.
Robin, instance of pugnacity in, 222.
Rook, a specimen with white whings roticed,

52.

Rooks, pied, a family of noticed, 167.
Rasores, improperly placed beside the Colúm.
bidæ, 329.

Ruffs, changes of plumage in, 479.

Salix caprea, section of a piece containing the

larva of the lunar hornet sphinx, figured,
21; transverse sections, showing the perfo
rations made by the same caterpillar, 22;
economical purposes to which the wood is
applied, 2..

Salmonidae, existence of the migrative impulse
noticed in the fry, 133.

Salmon, observations upon, in relation to spawn-
ing, 209.

Saurians, fossil, on the structure of, 281.
Saurocéphalus, description of, 349.
Saúrodon, description of, 350.

Sciurus palmarum, see palm squirrel; tristri-
àtus, described, 499.
Sciuróptera fimbriata, Turnbúllii, described,

584.

Scissodésma figured and described, 371.
Scolopax major, on the plumage of, 479.
Sea-Dates. See Lithódomus dáctylus.
Sérpula triquetra and vermicularis, opercula of,
477.

Sheppey, fossil fruits of, method of preserving
them, 336; list of plants indigenous to, 554.
Shooting Stars. See Meteors.
Sienite, experiments upon the fusion of, 148.
Silvery orange tree, notice of its age, 195.
Simiæ, characters of, 525.
Simladæ, characters of, 525.
Sirex, new species described, 630.
Snails, eaten by Australian savages, 78; musical
sounds attributed to, 46; upon the reparative
powers of the animal, 529.

Snake, killed 200 yards from the shore; obser.
vations on the swimming of, 384.
Snowfleck, changes of plumage, 263.