Quarterly Journal of Conchology. 145 



on Bermuda and Bahama. It is nearly allied to H. Bermu- 

 dcnsis, but is much larger. 



Guesteria Powisiana, Pfr. Mr. Bland found a specimen in 1851 

 of this species near Marmato, at 5000 ft. elevation on the 

 Western Cordillera of the Andes. 



Simpulopsis Dominicensis, Pfr. The " Vitrina' ' mentioned by Pfeiffer 

 as from Haiti is probably a young shell of this species. 



Helix bracteola, Fer. Identical with H. vortex, Pfr. 



Helix Sargeuti, Bid. Little Inagua, Bahamas. It is similar in 

 form to H. Duclosiana, Fer., but the interior projecting tooth 

 and basal marginal callus are wanting. It belongs to the sub- 

 genus Plagioptycha, which is peculiarly characteristic of the 

 Haitian fauna, and is additional evidence of the former more 

 intimate connection of Inagua and Turks' Island with Haiti. 

 The species is dedicated to Mr. Daniel Sargent of Inagua. 



Helix Marginella, Gmel. This species occurs in Vieque and 

 Culabre as well as in Puerto Rico. In some specimens from 

 Mayaguez, Puerto Rico, the dark band almost covers the up. 

 per whorls, leaving only a narrow lighter colored line next the 

 sutures ; the dark band equally wide at the base. 



Helix Gaskoini, Pfr. St. Domingo. Probably a variety of H. bi- 

 zonalis, Desh. 



Helix bizonalis, Desh. The habitat, apparently unknown by 

 Deshayes, is erroneously given in Chemnitz as Manilla, but the 

 correct locality is Haiti. Deshayes places H. Marginata, Fer., 

 in the synonymy. The occurrence of the nearly allied forms of 

 H. Sagemon in Cuba, H. bizonalis in Haiti, and H. Marginella 

 in Puerto Rico is interesting. The faunal connection of Haiti 

 and Puerto Rico is shown by the prevalence of forms closely 

 related to H caracolla ; and H Audebardi of Haiti is nearly alli- 

 ed to H.Luquillensis of Puerto Rico. ' H bizonalis is placed by 

 Von Martens (Albers, ed. 2) in the subgenus Obba, while H. 

 Sagemon and H. Marginella are in Caracolus. 



Helix platystyla, Pfr. Pfeiffer doubtfully gives the locality as 

 "Moluccas;" and places it next Hconspersula, Pfr. and H.fusco- 

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



