372 RISSOINA. 



R. WooDWARDi, Carp. PI. 56, fig. 72. 



AVhitish, with 12-14, narrow plicne, and wider interstices, which 

 are longitudinally, not spirally striated; whorls 7-8, subplanate, 

 suture impressed. Length, 3 mill. 



Mazatlan. 



The unfigured R. clandestina, C. B. Ad. has been referred here ; 

 if identical, it will take precedence. 



R. cosTULATA, Pease. PI. 55, fig. 32. 



White, with a central chestnut band, prominently longitudinally 

 ribbed, spirally striate ; whorls plano-convex, with channeled suture. 



Length, 5 mill. 



Paumotus Is. 



R. INCERTA, Souverb. PI. 55, figs. 34, 33. 



Solid, subulate, white, with or without a spiral chestnut band, 

 obliquely, strongly, longitudinally 12-13 ribbed, interstices with 

 crowded spiral striae, most conspicuous anteriorly; whorls 10, slightly 

 convex, with deep suture; lip strongly varicose. Length, 8*5 mill. 



New Caledonia, Viti and Samoa Is. 



The latter localities are for R. terebra, Garrett, (fig. 33) which 

 appears to be identical. 



R. DEBiLis, Garrett. PI. 56, fig. 48. 



White, with small slightly oblique, rounded ribs, fading anteriorly, 

 interstices finely striate spirally, the strise continuous and more 

 distinct on lower part of body whorl ; whorls 8, convex, with deep 

 suture ; peristome varicose externally. Length, 4"5 mill. 



Viti Is. 

 R. Nevilliana, Weink. PI. 55, figs. 37, 38. 



Whitish, indistinctly yellow banded, somewhat shining, with 

 strong, longitudinal, unequal costse, and very light spiral stride; 

 whorls more than 8, angulated, with very deep suture; lip subvari- 

 cose. Length, 13 mill. 



Near Hong Kong, China. 



R. GERTRUDiE, Tenison Woods. PL 55, fig. 39. 



Rather thin, translucent, milk-white, with small, rounded, subob- 

 solete longitudinal plicae, slightly spirally striate towards the base; 

 whorls 8, somewhat convex, suture broadly margined ; lip dilated in 

 the middle, thickened; base rimate. Length, 4*5 mill. 



King's Island, Tasmania. 



