GASTEROPODA. 



Shell carinated, upper surface rugose, epidermis thin ; callous 

 beneath, shining; columella with one tooth or fold; lamelli- 

 ferous on both sides of the aperture ; peristome straight, slightly- 

 thickened. 



"The lingual membrane of C. Salleana, Cuming, is broad, 

 elongate, with numerous longitudinal series of teeth. Teeth 

 00- 5 ' 1 • 5 • 00; the central tooth (o. Fig. 17) oblong, distinct, with 



2 3 



^H^pK 



1/ 



J^fcPf^O 



Fig. 17. 



a broad simple reflexed tip ; the first and second lateral teeth 

 (1 and 2) rather broader than the central one, with a three- 

 toothed recurved tip ; the third (3) narrow, elongate, with a 

 slightly recurved end ; the fourth and fifth (4 and 5) much 

 larger, oblong, and irregular shaped ; the fourth about half as 

 wide as the fifth, with three or four dentations on the inner side 

 of the upper edge; the fifth very large, broad, with a large 

 subcentral reflexed lobe ; the lateral teeth are very numerous, 

 subequal, similar, compressed, transparent, with a recurved 

 tip, those of the inner teeth of the series being bifid." — (Gray.) 

 Distribution, 2 species. Mexico. 



Peoseepina, Gray, 1840.* 



Etymology, Proserpina, the daughter of Ceres. 



Type, P. nitida, Gray. 



Synonym, Odontostoma, D'Orbigny. 



Shell globose or depressed, smooth, shining ; columella with 

 one fold ; body of the penultimate whorl provided with one 

 or many spiral plaits, or wanting ; aperture lunate, contracted 

 often by palatal laminse ; peristome thin, straight. 



P. Swiftii has the columella fold only, and is the sole repre- 

 sentative of the fam.ily at present known to inhabit South 

 America. 



Distribution, 7 species. Cuba, Jamaica, Venezuela. 



* See p. 289. 



D 49 



