56 IIELIX §. 21. 



310. H. marcida Bcnson. -{• 



«T. subobtcctc pcrforata, deprcssa, solida, superne ob- 

 lique regulariter costulata , subtus laeviori , sub epidermide 

 fulvido-cornea albida; spira vix elevata, sutura impressa, apice 

 obtusiusculo ; anfr. 6 lente accrescentibus , ultimo rotundalo, 

 subtus planulato; aperlura sublate lunata, obliqua; perist. recto, 

 tenui, margine columellari oblique descendente, crassiusculo, 

 suporne breviter reflexo, perforationem subtegente. — Diam. 

 maj. 14, min. 12, axis 8 mifl.» (B.) 



Ilelix marcida Bens. in Ann. and Mag. 2d. ser. XII. p. 92. 



Nec Shuttl. 1832. 



llabitat in insula Ceylon (Layard). 



320. H. cuclasta Shuttlcworth. 



T. angustissirae umbilicala, convexo-depressa, tenuis, con- 

 fcrtim capillaceo-striata, sericea, fusco-cornca ; spira paruni 

 olevata, vertice subtili; sutura impressa; anfr. 4 vix convexius- 

 culi, sensim accrescentes, ultimus non descendens, rotundatus, 

 peripheria obsolete angulatus, circa perforationem subcxcavatus; 

 aperlura parum obliqua, late lunaris; perist. simplex, rcctum, 

 marginibus distantibus, columellari dcclivi, superne dilatalo, pa- 

 tcnte. — Diam. maj. I2V2, min. 11, alt. 6 milL (CoII. Nr. 124.) 



Helix euclasta Shuttl. Diagn. n. Moll. Nr. 6. p. 130. 



— — Reeve Conch. ic. n. 1323. t. 189. 



— — (Patula) P[r. Vers. p. 125. 



— Sivifti Pfr. in Pi-oc. Zool. Soc. 1854. p. 5J. 

 |5. Spira paullo magis elevata. 



Habitat in insulis St. Thomas et Cuba, var. [5 in Portorico. 



32L H. subconoidca Pfr. 



T. angustissime perforata, depressa, tenuis, fragilis, supcrnc 

 disliucte costulata, pellucida, cornca; spira brcvissime conoidea, 

 vertice obtuso; anfr. 5 convexiusculi, lente accrescentes, ultimus 

 non descendens, supra medium subangulatus, basi modice con- 

 vexus, distanter radiato-striolatus; apertura parum obliqua, lu- 

 naris; perist. simplex, rectum, marginibus vix convergenlibus, 

 columellari leviter arcualo, ad perforationem vix reflexiusculo. — 

 Diam. maj. 10%, min. Oy^, alt. 5V2 mifl- (Mus. Cuming.) 



Ilelix subconoidea Pfr. in Proe. ZooL Soc. 1854. p. 51. 



— — Reevc Conch. ic. n. 1326. t. 189. 



— — (Patula) Pfr. Vcrs. p. 12 5. 



Ilabitat in insula Ceylon (Thwaites). 



