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Seite 149
... evidence that the original number of claws must have been three . As a consequence , we find a rudimentary third claw in Paratropididae and some Theraphosidae , and we find three claws on the posterior legs and two claws with a rudimen ...
... evidence that the original number of claws must have been three . As a consequence , we find a rudimentary third claw in Paratropididae and some Theraphosidae , and we find three claws on the posterior legs and two claws with a rudimen ...
Seite 152
... evidence is furnished for their removal from this sub - order . If it will ever be possible to confirm my supposition that in the Mygalo- morphae the sixth abdominal somite persists throughout life , then this would be indeed the ...
... evidence is furnished for their removal from this sub - order . If it will ever be possible to confirm my supposition that in the Mygalo- morphae the sixth abdominal somite persists throughout life , then this would be indeed the ...
Seite 155
... evidence also tends strongly in this direction ; and although it might be much more convenient , as in the first case , to place the " Cribellates " together as distinct from the " Ecribellates , " I cannot believe that this course ...
... evidence also tends strongly in this direction ; and although it might be much more convenient , as in the first case , to place the " Cribellates " together as distinct from the " Ecribellates , " I cannot believe that this course ...
Seite 156
... evidence of this attitude in the separation of the various cribellate families and their inclusion under different sub - orders . The Zoropsidae which Dahl once treated as a single family he now has split into three families . Of these ...
... evidence of this attitude in the separation of the various cribellate families and their inclusion under different sub - orders . The Zoropsidae which Dahl once treated as a single family he now has split into three families . Of these ...
Seite 157
... evidence furnished by embryology . Although a great deal remains still unknown and should be investigated , and other things are not con- vincing and should be reinvestigated , yet on the whole we have a fairly good picture of ...
... evidence furnished by embryology . Although a great deal remains still unknown and should be investigated , and other things are not con- vincing and should be reinvestigated , yet on the whole we have a fairly good picture of ...
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Häufige Begriffe und Wortgruppen
abdomen abdominal segments abdominal somite abdominal tergites anal operculum Anthracomarti appendages Arachnida Architarbi belong book-lungs British Museum carapace Carboniferous cephalothorax characters chelicerae claws Coal Measures convex Coseley Cryptomartus dorsal surface eighth Eophrynus Eoscorpius Eurypterida evolutionary trends eye-tubercle eyes Family femur fossil Arachnida fourth pair Fritsch front fused genera genital opening Genus Haptopoda Illinois State Museum intersegmental line joints lateral lungs Mazon Creek median line metatarsus mouth movable Ninth tergite operculum Opiliones Order pair of legs Palaeophonus Palaeozoic Palaeozoic Arachnida Palpigradi paratype patella pedal coxae pedipalpal coxae Petrunkevitch photograph Phrynichida Piece a shows Pleophrynus Pocock posterior edge present preserved priesti procurved Pruvost pygidium represented Ricinulei Schizomida sclerites scorpions Scudder second sternite shape shown in Figure side single spiders spinnerets spiracles sternite sternum structure tarsus tergal plates tergite Textfigure Thelyphonida tibia Total length transverse triangular Trigonotarbus trochanter tubercle ventral surface visible wider than long Xiphosura
Beliebte Passagen
Seite 144 - Monday evenings at 8:15 o'clock from October to May, inclusive, at the American Museum of Natural History, 77th Street and Central Park, West.
Seite 283 - Curculioides scaber (Sc udder) and Curculioides sulcatus Melander were described and figured by me on pp. 82 and 83 of my Monograph in 1913. Each is represented by a single specimen from the Pennsylvanian of Mazon Creek, Illinois. C. scaber is in the collection of the US National Museum (No. 37965); C. sulcatus in the collection of the Walker Museum of the University of Chicago (No. 9235). Curculioides gracilis Petrunkevitch, was described and figured by me in the Palaeozoic Arachnida of Illinois,...
Seite 297 - ... the juncture line of the two chelicerae. The carapace is anteriorly narrower than posteriorly. Its widest place is between the second and third pair of coxae where it measures 2.6 mm. while the length of the carapace is 3.5 mm. It is therefore distinctly longer than wide and oval in shape. Between the posterior edge of the carapace and the anterior edge of the abdomen a narrow space is bridged by the petiolus which has the shape of an elongated pentagon with the apex reaching the sternum and...
Seite 300 - XTV-XVI. 15. Demanet, Felix et Victor van Straelen. Classe des Arachnides. in: Renier, A., Stockmans, F., Demanet, F. et van Straelen, V. Flore et faune houillieres de la Belgique. Bruxelles. Third volume. 1938, pp. 206-209. Text-figures 82-84. Plate 140. 16. Dorlodot, J. de. Decouv. de Graeophonus anglicus dans le Couchant de Mons.
Seite 303 - Hunter, JRS (1886) Notes on the discovery of a fossil scorpion (Palaeophonus caledonicus) in the Silurian Strata of Logan Water, Tr.
Seite 309 - Ixodoidea zu den fossilen Anthracomarti. Sitzungsberichte u. Abhandl. Naturf. Gesell. Rostock. Dritte Folge, Vol. 3, 1932, pp. 104-126, figures 1-21. 123- Scudder, SH A contribution to our knowledge of Palaeozoic Arachnida. Proc. Amer. Acad. Arts and Sci., 1884, Vol. XX, pp. 15-22. 124. Note on Anthracomartus carbonis. CR Soc. Entomol. de Belgique, 1885, Vol. XXIX, pp. 84-85. 125. Systematic review of our present knowledge of fossil insects, myriapods and arachnids. US Geol. Survey, Bull. No 31,...
Seite 303 - ... Lesmahagow. Trans. Edinburgh Geol. Soc., 1888, Vol. V, pp. 185-191. 51. Iwanoff, PP Die embryonale Entwicklung von Limulus moluccanus. Zool. Jahrbiicher, Abt. f. Anat., 1933, Vol. 56, pp. 163348. 78 Text-figures. Plates 1-3. Bibliography. 52. Johansson, Gosta. Beitrage zur Kenntnis der Morphologie und Entwicklung des Gehirns von Limulus polyphemus. Acta Zoologica, 1933, Vol. XIV, 100 pages, 45 Text-figures. 53. Karsch, F. Ueber ein neues Spinnenthier aus der Schlesischen Steinkohle und die Arachnoiden...
Seite 310 - ... T. and G. Lindstrom. On a Silurian Scorpion from Gotland. Kongl. Svenska Vetenskaps-Akad. Handlingar, 1885, Vol. 21, No. 9, pp. 1-33. Plate. 135. Valchon, Max. Recherches anatomiques et biologiques sur la reproduction et le developpement des Pseudoscorpiones. These. Fac. Sci. Paris, 1938, Ser. A., No. 1779, pp. 1-208. Figures 1-161. 136. Verluys, J. Die Kiemen von Limulus und die Lungen der Arachniden.
Seite 134 - I assume to be the poison-gland. The segments resemble the fourth and fifth segments of Compsoscorpius elongatus. The fourth is square, 2.8 by 2.8 mm., the fifth is 5.0 mm. long and 2.8 mm. wide. This would mean that the total length of the scorpion to which the piece in question belonged was only a little greater than that of the type of C. elongatus. 2. Order PSEUDOSCORPIONES (Chelonethi) There are no representatives of this order in the Palaeozoic. Whether their absence is due to their belated...
Seite 180 - Cocoon either carried by the female holding it with her chelicerae, or if attached to the spinnerets then hemispherical in shape Family PISAURIDAE. * Upper claws with few teeth. Inferior claw smooth or with a single claw. Integuments usually with simple hair. Legs shorter, prograde without exception. Cocoon globular, carried by the female attached to her spinnerets. Posterior row of eyes usually so strongly recurved that the arrangement of the eyes may he said to be in three rows, in which case the...