350 RISSOIA. 



R. CINGULATA, Phil. PL 68, fig. 93. 



Somewhat solid, translucent ; whorls 6, convex, with linear su- 

 ture, spirally lirate, with wider interspaces, 10 lirse on the last 

 whorl ; lip simple, sharp ; yellowish brown. Length, 4 mill. 



Sicily. 



R. TENERA, Phil. PI. 68, fig. 94. 



Thin, pellucid, brownish white ; whorls 5, with deep suture, and 

 strong spiral ridges, of which there are 9-10 on the last whorl, the 

 wider interstices slightly longitudinally striated ; lip simple, den- 

 tate by the ridges. Length, 2 mill. 



Near Syracuse, Sicily. 



R. CRISTALLINULA, Manzoni. PI. 65, fig. 7. 



Vitreous, translucent, shining ; wdiorls 5, with margined suture, 

 the last numerously spirally striate ; lip a little thickened, sub- 

 produced ; subperforate. Length, 1*5 mill. 



Canary Is. 



R. CALLOSA, Manzoni. PI. 65, fig. 6. 



Imperforate, solid, opaque, whitish, with short spire and indis- 

 tinct, submargined suture ; whorls 5, closely spirally striate, last 

 whorl inflated; lip simple, rather thick. Length, 1*6 mill. 



Canary Is., Madeira. 



R. depicta, Manzoni (■= R. punctifera, Watson Ms.) is a syn- 

 onym. 



R. Laurte, Folin. PI. 71, fig. 99. 



Polished, crystalline, smooth, obscurely spirally lirate at the 

 periphery and base ; whorls 8, slightly convex, with shallow suture ; 

 aperture with thickened lip, spirally lirate within. Length, 2 mill. 



Unfigured and Undetermined Species. 



R. delicata, Phil. Red Sea. 



R. ligata, Gould. Hong Kong. 



R. procera, R. subulina, R. elegantula, R. mundula, R. 



SPIRATA, R. PATULA, R. MIRIFICA, R. LUCIDA, R. EGREGIA, all of 



Arthur Adams. Jaimn. 



R. AEBOLIRATA, Carp. Cajie St. Lucas, L. California. 



R. TURRicuLA, H. C. Lea. So. Carolina. 



This species has not been identified. 



