HELIX.— Plate LXVI. 



TuK NAiiKOW siMKE Hki.ix. SliiU uMibilicatcd, somc- 

 wlmt dcpressly globose, pale liorny, very finely 

 striated ; spire convex ; whorls five to six, soniewliiit 

 rounded, narrow, last whorl rather swollen; umbi- 

 lieu^• rather deep ; aperture transversely lunar, lip 

 simple. 



Adams, Contributions to Conchology, No. 3. p. :5C. 



ilab. Jamaica. 



I'liietly distinguished from its congeners i)y the more 

 rapid cidargemeut of the whorls, which gives the shell a 

 more globose form. 



Species 344. (Mus. Adams.) 

 Helix pekdepress.\. Jlel. testa umbilicatd, orbiculari, 



tliscoided, altiido-comed ; tpird peculiarilfr concaro- 

 (lepresm ; anfraclibua tjuinque, suprmi obtuse aiir/u- 

 talis, infra rotundatis ; umbiluo talissimo, ampio, per- 

 spectivo ; aperturd eltiptico-lunari, labro gimplici. 



Tiir. VEKY DEi'KEssKi) IIelix. Shell umbilicated, orbi- 

 cular, discoid, whitish-horny ; spire peculiarly con- 

 cavely depressed ; whorls five, obtusely angled at 

 the upper part, round beneath ; umbilicus very broad 

 and large, perspective ; aperture elliptically lunar, 

 lip simple. 



Adams, Contributions to Conchology, No. 3. p. 3fi. 



JIab. Jamaica. 



Well characterized by its broad open umbilicus, and by 

 the spire being pushed in, as it were, into a hollow plane. 



