80 



LAND AND FRESH-WATER SHELLS OF N. A. [PART IIL 



Anculotus inmiilus, Courad, which is considered a synonym iu 

 Haldeman's Leptoxis, is thus described in New Fresh-Water 

 Shells, p. G2. An authentic specimen in the Academy's collec- 

 tion, at Philadelphia, does not appear to be A. integra. 



Anculotus pumilus. — Shell very small, obliquely oval, blackish; spire 

 consisting of one entire convex whirl ; apex eroded ; body whirl regularly 

 convex ; base with a groove behind the columella, aperture suborbicular, 

 patulous. 



Inhabits the Black Warrior River and Bayou Teche ; the latter locality 

 was communicated by Prof. Green, who supplied me with a specimen. 

 ( Conrad.) 



This species is nearly allied to, if not identical with Somato- 

 gyrus isogonus. 



Cat. No. 



9219 

 9228 



No.ofSp. 



Locality. 



] Froia whom received. 



Ohio. [Pa. I 



Flemington, Centre Co.,; 



Al»I]VICOL«A, Gould & Haldeman. 



Jaws present. Lingual dentition of A. 2^orata: Rhachidian 

 tooth very short and broad, with a tongue-shaped process from 

 the middle of the anterior surface, reaching beyond the base. 

 Intermediate tooth with a short broad body having a strongly 

 projecting infero-interior angle, and a very long peduncle. 

 Formula of the denticles: ^-5-18-30. Shell small, rather 



Fie. 158. 



'^^ 



Lingual dentition oi Amnicolaporata. — [Stimpson.] 



* 



short, ovate or subglobular, thin, smooth, perforate ; spire not 

 acute. Aperture broadly ovate, not oblique ; outer lip thin and 



