104 /ONITKS. 



II. NITKNSOIDKS, d'Orb. 1*1. f> 1 , figs. 39-41. 



Widely umbilicalcd, thin, shining, pellucid, light "greenish 

 corneous; whorls 4J, the last suhdepressed, not descending ;; 

 apert uri 1 almost diagonal, Innately rounded. Diam. 10 mill. 



Cuba. 



The single specimen in the d'Orbigny collection diller* from 

 the figure in having a narrower umbilicus and more declining 

 colnmella, and can scarcely be distinguished from the true 77. 

 alliaria. 



II. IMPLICANS, Gnppy. PL 51, fig. 42. 



Shell minute, discoidal, openly and widely nmbilicated, whitish, 

 smooth, pellucid, shining; whorls 4, depressed, plane above, 

 slowly increasing, spire plane, aperture suborbicnlar. 



Diam. 2 mill. /. Trinidnd, West Indies. 



Unfigured Species. 

 11. SMITHIANA, Pfr. Ml. riot on, Ins. Haiti. 



II. BRYODES, Shuttlew. Porto Jfico. 



^* # Mexican, Central and South American 



II. SAXATILIS, Couthouy. PL 52, figs. 49, 50. 



Umbilicus moderate, shell somewhat llattened above, convex 

 below, shining, lightly striate, greenish corneous ; whorls 4, mod- 

 erately increasing, suture channeled, aperture large, suborbicnlar 

 peristome nearly continuous. Diam. C> mill. 



Tier r a del L'neyo. 

 It. ORDINARIA, Smith. PL 52, figs. 51, 52. 



Umbilicus rather wide, exhibiting two volutions, shell thin, 

 glossy, transparent, discoidal ; whorls 3J, convex, with channeled 

 and margined suture, last whorl rounded at the periphery, aper- 

 ture large, lunate. Diam. 3 mill. 



Tom Hay, Patagonia. 



"Apparently distinct, although a near relation to 11. saxatiiis 

 of Couthouy." 



H. INSIGNIS, d'Orb. PL 51, figs. 46-48. 



Moderately nmbilicated, very thin, diaphanous, shining, 

 scarcely striulate, yellowish corneous ; whorls 4J, with suture 

 impressed, regularly increasing, the last double the width of the 



