396 LAND AND FRESH-WATER SHELLS OF N. A. [PAHT IV. 



A. Rogersii, Conrad, uuivevsally considered to be a young 

 variety of the preceding is tlius described : — 



Melania Bogersii. — Shell subovate, with rather distant, prominent 

 spiral lines ; whorls convex ; body-whorl ventricose ; aperture 

 subovate, half the length of the shell ; columella obtusely an- 

 gular at the base. 



Variety A. Destitute of revolving lines ; whorls gibbous. 

 Ohservations. — Inhabits with the preceding species. It was 

 given me by Professor William B. Rogei-s, to whom I have dedicated 

 the species. — Conrad. 



A. carinatus, Anthony, A. KirtlancUanus, Anthony, and 

 A. inflata, Lea, are all variations of this protean species. 

 Their descriptions follow : — 



Anculotus carinatus. — Shell oblong; spire as long as the aperture; 

 volutions four, convex; suture not remarkable; body-whorl angularly 

 ventricose; color olivaceous; from 4-5 elevated, black carinae, com- 

 mencing at the upper part of the aperture, traverse the -p- iTJa. 

 body- whorl ; aperture within bluish-white and translucent, 

 the carinae being ver}'^ apparent through it. 



Extreme length of shell, 'i ; breadth, h of Jvn inch. 



Observations. — For this beautiful species of Anculotusl 

 am indebted to Mrs. Say, who found it at the Falls of the 

 Kanawha, a few weeks since, and kindly presented me with specimens 

 of it for description. — Anthony. 



Anculotus Kirtlandianus. — Shell turreted, with four convex whorls ; 

 spire truncated, the truncation generally destroying one of the volu- 

 tions ; the body-whorl slightly ventricose ; color dark olive ; aperture 



subovate ; base attenuated, within clouded pur- 

 Fig. 7776. Fig. 777c. ' ' ^ 

 pie and banded. 



Length of shell, | ; breadth, ^ of an inch. 



Observations. — Another species which I owe 



to the kindness of Mrs. Say. It is found in the 



same situations as ^4. carinatus (^Falls of the 



Kanawha) ; it resembles very much a 3Mania, the spire being quite 



as much elevated as in most of the species of that genus ; the young 



are very beautifully hauded.— Anthony. 



Melania injlata. — Sh^W conical^ inflated, dark liorn-color; apex 



