HELIX. 101 



scarcely 5, convex, the last rounded, deflected in front ; aperture 

 auriform-lunar, margins converging, a little expanded. 



Diam. 15-16 mill. 



Cuba. 

 H. RARIPILA, Morelet. PL 22, figs. 27-29. 



Narrowly umbilicated, thin, subdiaphanous, corneous, with short, 

 soft hairs ; whorls 4, a little convex, the last rounded, not descend- 

 ing, very slightly constricted at the aperture ; aperture scarcely 

 oblique, the margins approaching, columella subangularly descend- 

 ing. Diam. 7-8 mill. 



Cuba. 



It is H. stigmatica, var. of Poey. 



H. DEBILIS, Pfr. PI. 22, figs. 36-38. 



Umbilicated, very thin, light corneous, with close thread-like 

 oblique strise; whorls 4, a little convex ; aperture large, subcircular, 

 lip thin, acute. Diam. 9'6 mill. 



Cuba, Porto Rico. 



Is H. fraqilis, Pfr. 



%/ t/ 



H. SIGMOIDES, Morelet. PI. 22, figs. 57-59. 



Narrowly perforate, whitish corneous, thin, shortly pilose, spire 

 involute, aperture immersed, suture deep ; whorls 4, convex, the 

 last rapidly enlarging, tumid, a little flattened laterally. 



Guatemala. 



H. vitrinoides, Tristram, an unfigured species; is referred here by 

 Pfeiffer. 



Unfigured Species. 



H. GRACILIS, Poey. Cuba. 



H. PELLUCIDA, Ads. (= H. INVASA, Pfr.). Jamaica. 



H. HILUM, Weinl. and Mart. Haiti. 



H. HYPOLEPTA, Shuttlew. St. Thomas, W. I. 



H. ALICEA, Guppy. Trinidad. 



* 



H. GYROPLATYS, Dohrn. Antioquia, N. Granada. 



H. INGERSOLLII, Bland. PI. 20, figs. 47, 48. 



Moderately umbilicated, thin, translucent, rather smooth, white, 

 spire plane, apex subimmersed, suture impressed; whorls 5i, 

 slightly convex, slowly increasing, the last not descending, more 

 convex on the base. Diam. 4 mill. 



Southwestern Colorado, U. S. 



