HELIX. 55 



H. C^ECOIDES, Tate. PI. 9, fig. 22. 



Minutely perforated, a little shining, brownish corneous, with 

 equal distant lamellae ; whorls 4, convex, suture profound ; 

 aperture almost circular. Diam. 2 5 mill. 



Chontales Forest, Nicaragua. 

 H. (L^CA, Gnpp3 r . PI. 9, fig. 23. 



Scarcely perforate, obliquely costulate, brownish corneous, 

 apex smooth, suture deep; whorls 4, aperture obliquely sub- 

 circular, the extremities of the peristome joined by a diffused 



columellar callus. Diam. 2 mill. 



Ins. Trinidad, West Indies. 



H. IERENSIS, Guppy. PI. 9, fig. 24. 



Profoundly umbilicated, somewhat obliquely costulate, brown- 

 ish corneous, apex smooth, suture deep ; whorls 5, slightly 



carinatcd. Diam. 3 mill. 



Ins. Trinidad, W. Indies. 



H. BACTRTCOLA, G tippy. PI. 9, fig. 25. 



Perspective^, widely umbilicated, closely radiatety costulate, 

 brownish corneous ; whorls 7, narrow, slowly increasing, the 

 last with carinate periphery, apex smooth, shining. Diam. 4 mill. 



Ins. Trinidad, West Indies. 



H. GRANUM, Strebel. PL 9, figs. 26-28. 



Narrowly perforate, thin, light horn-color, scarcely shining, 

 indistinctly costulate ; whorls 4, well rounded, with deep suture. 



Diam. 28 mill. 



Mirador, Mexico. 



H. HARPULA, Reinhardt. (Unfigured.) Japan. 



Section ANGUISPIRA, Morse, 1864. 



H. IDAHOENSIS, Newcomb. PL 10, figs. 29-31. 



Profoundly umbilicated, ash}^ corneous ; whorls 5, the two first 

 smooth or minutely obliquely striate, the others crossed by 

 strong, thin, sharp, white costse, from 20 to 26 in the last whorl, 

 suture well impressed. Diam. 13-18 mill. 



Idaho. 



Varies considerably in its proportions, some specimens being 

 much flatter. Notwithstanding the fact that the sculpture in 



