Notes on Certain Terrestrial MoUus'ks, 82 



closely related to H. caracolla*, and H. Audehardi of Haiti 

 has a near ally in H, Luquillensis of Puerto Rico. 



H. hizonalis is placed by v. Martens (Albers ed. 2) in the 

 sub-genus Obba, probably with reference to the supposed 

 habitat, "Luzon," while Sagemon aixl marginella are in 

 Caracolus. 



Helix platystyla, Pfr. {Leptoloma) . 



Pfeiffer described this species in the Zool. Proc, 1849, 

 from a specimen, ^^expallescens,^' in Cuming's Cabinet. In 

 Mon. Hel. HI, 175, the habitat doubtfully given is Moluccas ; 

 it is placed next before H. conspersula, Pfr. and H. fusco- 

 cincta^ C. B. Ad. of Jamaica, to which it is very closely allied. 



An example frona Jamaica in my Cabinet agrees closely 

 with Pfeiffer's description and Reeve's figure (Conch. Icon. 

 N. 487, t. 90). Similar specimens in the Chitty Collection, 

 British Museum, are labelled H. fusco-cincta , var. II. con- 

 spersula was described by Pfeiffer in 1845, the habitat un- 

 known. In 1871 Mr. Sowerby informed me that a specimen 

 in the British Museum is ascribed to India. 



H. jplatystyla belongs, I' believe, to Jamaica as well as 

 H, consjpersula SLudfusco-cincta. 



Cylindrella gracilicollis, Ter. 



I am indebted to Mrs. Wm. Klatte for several specimens 

 of this species, found in the vicinity of Port au Prince, Haiti. 

 It has been erroneously attributed to St. Thomas. Judging 

 from a very young individual it appears that the number of 

 whorls in a perfect shell must be from twenty to twenty-two. 

 The four upper whorls are smooth. 



On the axis there are two revolving laminse. I have not 

 had an opportunity of examining the internal structure of 

 many species from the Island of Haiti, but find two lamellsG 



* H. caracolla is found semi-fossil only in St. Cvoix, but Mr. Swift assured me that I 

 erroneously referred to H. marginella as occurring there in a similar condition (Annals 

 Vn. 357). 



