lIELICIDiE. 81 



145. Helix (Acavus) skinneri, Reeve. 



1 Upper Onavab, Ceylou j coll. F. L. LayarU, Esq. 



146. Helix (A.CavUS) waltoni, Reeve. 



9 Ceylou ; coll. Hugh Ncvill, Esq. 



var. albolabris. 



1 Ceylon ; coll. Hugh Nevill, Esq. 



147. Helix (Acavus?) trailli, PfeifEer. 



1 Borneo j ex c. Damon. 



Sub-Genus STYLODON {tji^e R. unidentata). 



148. Helix (Stylodon) unidentata, Chemn. 



24 Maho, Praslin, Curieuse, Felicite and Silhouette, Seychcllc I.; coll. 

 G. Nevill, Esq. 



149. Helix (Stylodon) studeriana, Femssac. 



14 Praslin, on the stems of the " Coco de M6r ;" coll. G. Nevill, Esq. 



Sub-Genus EUCOCMLIAS, Theobald (type E. octhoplax). 



[=? Hadra, Albers. pars ? = P/irt?ii(i.] 



H. sulcocincta, Martens, and H. pyrostoma, Ferussac, appear 

 botli to belong- to this sub- genus. I think the Group will pro- 

 bably prove separable from that of the West Indian H. lavipas, 

 the t}^e of the Sub-genus, Pliania. 



The Group is probably close allied to Stylodon, possibly not 

 separable. 



150. Helix (Eucochlias) ochthoplax, Benson. 



4 Khasi Hills ; coll. Major 11. H. Godwin- Austen. 

 1 Pegu; ex c. As. Soc, Bengal. 



I am indebted to Mr. Blanford's constant libei-ality for the 

 follomng note on Eucochlias octhoplax : " A true Helix, nearly 

 black, with pale, tawny markings, surface gi-anulate ; jaw 

 grooved.— W. T. B." 



151. Helix (Eucochlias) ? bougainvillei, Pfeiffer. 



1 Solomon I.; ex c. Dr. J. C. Cox. 



152. Helix (Eucochlias) ? illustris, Pfeiffer. 



II Cambodia ; ex c, Damon. ' 



