346 



RISSOIA. 



C. L^EVIS, DeKay. PI. 71, fig. 75. 



Shell moderately solid, with 5 very convex whorls, separated by 

 a deep suture, smooth, white in adult specimens, corneous in the 

 young ; aperture small, umbilicus distinct and rather large. 



Length, 5 mill. 



New York, Connecticut. 



This poorly described and figured species has not been recog- 

 nized ; it may be identical with the preceding one, or the following. 



R. MINUTA, Totten. PL 71, fig. 74. 



Thin, smoothish, apex obtuse, suture well -impressed, narrowly 

 urnbilicated, yellowish-brown to ferruginous ; whorls 5, convex, 

 very finely striate. Length, 3*75 mill. 



New England, Florida. 

 R. GEORGIANA, Pfeffer. PL 71, fig. 2. 



Imperforate, shining, smooth, or microscopically striate with 

 growth-lines, whitish, under a thin greyish straw-colored epidermis; 

 whorls 5, flattened convex, with moderately impressed suture; 

 peristome continuous. Length, 2'4-2'8 mill. 



South Georgia Id. 



Unfigured and Undetermined Species of Cingula. 



R. PETININGENSIS, 'Gould. (PL 71, fig. 82.) = Paludestr'nnt. 



R. MODESTA, H. C. Lea. == Assiminea. 



R. SANDERSONI, Verrill. Cape Hatteras, N. C. 



R. CONICA, C. CONCINNA, R. SOLIDA, C. B. Ad. Jamaica. 



R. VERRILLI, and R. ISLANDIC^E, Friele. (Desc. inaccessible to 

 me). Arctic Ocean. 



R. PUNCTATO-STRIATA, Tenison Woods. Tasmania. 



R. ATOMARTA, Gould. China Sea. 



R. SCHLOSSERIANA, Brasilia. Leachia elongata, Phil. 



R. FILOSA, Brasilia. Suez. 



Ii. i-AUPERCULA, C. B. Ad. = Diala. 



Section ONOKA, H. and A. Adams, 1854. 



H. STRIATA, Mtg. PL 63, figs. 71, 73. 



I Either solid, opaque, scarcely shining, whitish or yellowish, with 

 two chestnut bands ; whorls 6-7, moderately convex, spirally 

 closely striate, upper portion of whorls shortly longitudinally pli- 

 cate ; lip, in the adult, slightly varicose externally. 



Length, 4 mill. 



