103 



March 18, 1861. 



President in the Chair. 



The accompanying descriptions were presented by Dr. W. 

 Newcomb, of Oakland : 



Helix Carpenteri. — H. testa umbilicata, rotundato-conoidoa, 

 apice obtusa, albida, obscure fusca una-cinctura, oblique valde 

 striata, et stride sub-lente spiralibus numerosis iinpressce ; anfr. 

 5i rotundatis ; sutura bene signata ; apertura circulare cum 

 marginibus approximatis ; labium mediocriter expansum ad 

 columellam latam non adnatum. 



Diam. 23 mill. 



Hab. " Tulare Valley." Alt. 16i " 



Shell umbilicate, roundly conical ; apex obtuse, obscurely 

 marked with one brown liand ; well striated ; under the lens 

 numerous very minute spiral striations ; whorls five and one- 

 half rounded ; suture well marked ; aperture circular, with 

 margins approximating ; lip moderately expanded, at the co- 

 lumella broadly so, but not adherent. 



Mus. Cal. Acad. Nat. Sci. 



My cabinet. 



Remarks. — This shell, about the size of H. ramentosa, 

 (Gould) can scarcely be confounded with any known species. 

 It belongs to the Cyclostomoid groupe of Helices, and has the 

 aspect of a desert species. Dedicated to Philip P. Carpenter, 

 L. L. D., of Warrington, England. 



Belix Ayresiana. — H. testa sub-obtecte umbilicata, rotunda- 

 to-trochiformis, luteo-alba cum cinctura lata nigra ornata; anfr. 

 7 l^nte accrescentibus, sub-convexis, supra creberrime costulato- 

 striata et lineis numerosis spiralibus valde impressis. infra pal- 

 lidior et minute decussato-striata ; sutura valde impressa ; 

 apertura orbiculari-ovata; peristomate reflexiusculo ; columella 

 modice expansa. Diam. 22 mill. 



Hab. " Northern Oregon." Alt. 15 mill. 



Shell with umbilicus partially closed, roundly trochiform, 

 yellowish white, (above) furnished with a broad black band ; 

 whorls seven, slowly increasing, moderately convex, superiorly 

 with many rib-like striae and numerous spiral lines deeply im- 

 pressed, inferiorly pale and with minute decussating striations; 

 suture well marked ; aperture roundly ovate ; lip slightly re- 

 flected ; columella moderately expanded. 



Mus. Society. 



My collection. 



