HELIX.— Plate LXl. 



spire" flat ; whorls four to five, convex, the uppermost 

 horizontal, the last desceniling graduallj' and rounded ; 

 aperture lunar-subcircular ; lip simple, straigiit, right 

 margin slightly expanded, columellar margin a little 

 refleeted. 



Pfeiffek, Symbolffi, vol. i. p. 40. 



Uab. Cuba. 



The finely granulated surface of this species has a rough- 

 ness which is very peculiar. 



Species 306. (Fig. a, b, Mus. Adams.) 



Helix graminicola. Hel. testa umbiUcatd, subdepreuo- 

 globosd, olivaceo-fitscescenle, pellucidd, zona albidd ob- 

 scurd, lined iiiieiisi fused cingulatd ; spird convexd ; 

 anfractibus quinqne, minute striatis , aperturd lunari ; 

 peristomate tentii re/lexo, margine columellari laii dUa- 

 iato. 



The gkass-inhabiting Helix. Shell umbilieated, 

 somewhat depressly globose, light olive-brown, ti-ans- 

 parent, encircled with an obscure whitish zone and 

 deep brown line ; spire convex ; whorls five, minutely 

 striated ; aperture lunar ; lip thinly reflected, colu- 

 mellar margin broadly dilated. 



Adams, Contributions to Conchologj', No. 2. p. 32. 



Ilai. Jamaica. 



An extremely characteristic species, encircled by a dark 

 brown line, which falls iu the place of the suture and has 

 an obscure whitish zone beneath it. 



Species 307. (Mus. Cuming.) 



Helix aMMONIFOUMIS. Uel.ttstd late uniiilicatd, orbi- 

 eulato-concavd, depressd, tenui, diapltand, albido-gritea, 

 tuilavigatd ; spird tubimpressd ; anfractibus (juintfue, 

 depressis, ultimo perdilalato ; aperturd oblique lunato- 

 ovali; peristomate simplici, acuto, marginibiu conni- 

 ventibus, supero aulrorsum curvato. 



The ram's hokn Helix. Shell broadly umbiliaited, 

 orbicularly concave, depressed, thin, diaphanous, 

 wliitish-grey, rather smooth ; spire rather impressed ; 

 whorls five, depressed, the last much dilated ; aper- 

 ture oblique, lunar-oval ; lip simple, acute, margins 

 approximating, upjjcr margin curved in front. 



D'OUBIGKY, Voy. dans I'-Vmer. merid. pi. 2H.f. 10-13. 



Hab. Province of Yungas, Bolivia. 



This species is unknown to me in fine condition. M. 

 D'Orbiguy has figured a very characteristic specimen with 

 the livins; animal. 



