Bulletin, Ausgabe 28

Acad acute Animal aperture apex arcuate Arionta base of attachment bifid Binney's coll blunt Bost Bulimus callus central CHEMNITZ color columella Conch convex deferens denticle duct epidermis epididymis epiphragm eye-peduncles figured genital bladder genitalia genus globose GOULD Greater diameter height Helix Hemphill Hist horn-color Icon inner cutting point Jaw as usual Journ last whorl length lesser Limax Lingual dentition Lingual membrane Terr mantle marginal teeth median projection Mesodon Morse N. Y. Lyc N. Y. Moll narrow oblique obtuse orifice outer oviduct Patula penis sac perfect laterals peristome peristome simple PFEIFFER Plate Polygyra Proc Province Pupa reflected Region retractor retractor muscle ribs Shell umbilicated side cusps slightly species specimens spire stout striæ striated Strobila Subregion Succinea surface suture thickened thin tooth transverse Triodopsis TRYON umbilicus upper vas deferens W. G. BINNEY W. H. Dall Wetherby whorls Zonites