1 88 Qimtterly Journal of Corichology. 



Notes on the Sub-generic character of Helix 

 Jamaicensis, Chem., and on certain Terrestrial Moll- 

 usks from Haiti; with description of a New Species 

 of Helix from Colorado. — By Thomas Bland. 



Reprinted from the Annals of the Lyceum of Nat. Hist., New 

 York, vol. xi, June, 1875, pp. 146 — 154. 



A new species of Helix is described in this important paper— 



Helix Ingersollii, from Colorado. 



Helix (Thelidomiis) Jamaicensis, Chem. This species has the 

 same form of jaw and dentition as H. aspera and H. discolor. 

 Von Martens gives it as the type of Liochila, but it has the 

 same form of jaw and dentition as H. aspera and H. discolor 

 and belongs to Thelidomiis ; Liochila must therefore be placed 

 in its synonymy. Helix picta, Born, which he associates with 

 Jamaicensis, has the same type of jaw and dentition as H 

 muscarmm, Lea, the type oi Polymita ; H. picta therefore will 

 belong to same subgenus. 



A new var. of H Jamaicensis is described, differing from 

 the usual form in its more laterally produced aperture, the col- 

 umellar margin being oblique with a very broad callus, having 

 2 or 3 denticles across its edge, showing in this respect alliance 

 with H. aspera. It usually has a small tooth on the parietal 

 wall. 



Helix (Euiycratera) obliterata, Fer. Owing to the discovery by 

 Mr. V. P. Parkhurst of a dead specimen of this species near 

 Port au Prince, Mr. Bland is disposed to think that Haiti may 

 be its true habitat. Helix angiilafa, Fer. of Porto Rico is a 

 geographical var. of this species. 



Helix intiisplicata, Pfr. Found numerously near Port au Prince 

 by Mr. V. P. Parkhurst. It is synonymous with H. Smithiana, 

 Pfr., which was found on Mount Platon, thirty miles north- 

 east of Aux Cayes and described by Pfeiffer from specimens 

 sent by Mr. Bland. 



Helicina Cnmingiana, Pfr. This species is recognised by its well 



