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. PI. 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 striae ; whorls 4, a little convex ; aperture large, subcircular, 

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



Cuba, Porto Rico. 



IsH.fragilis,~Pfr. 



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 5, 

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

 convex on the base. Diam. 4 mill. 



Southwestern Colorado, U. S. 



