386 RISSOINA. 



It is R. ccelata, A. Ad. (fig. 91), R. grandis, Phil., and R. Cum- 

 ingii, Reeve, of Sowerby in Conch. Icon. (PI. 68, fig. 12). 



I think that R. elegantula, Angas (fig. 13), from So. Australia, 

 will prove a younger state of the species ; it has 8 whorls, and is 6 

 mill. long. A still younger state is probably R. Mohrensterni, 

 Desh. (fig. 23), from the Isle of Bourbon ; to which locality Nevill 

 adds Red Sea, Indian Ocean and Upolu (R. Schmeltziana, Dkr.Ms.). 



R. ANDAMANICA, Weink. PI. 58, fig. 21. 



Solid, whitish, with narrow, straight, slight, close longitudinal 

 riblets ; whorls 8, suture linear ; columella nodosely thickened be- 

 low, lip varicose. Length, 8 mill. 



Andaman Is. 

 R. CONCINNA, A. Ad. PL 58, fig. 18. 



Solid, shining, white, closely longitudinally striate, the striae ob- 

 scure below, and spirally striulate ; whorls 7, slightly turrited, flat- 

 tened ; columella callous below, lip externally varicose. 



Length, 5 mill. 



Philippines. 

 R. ADAMSIANA, Weinkauff. PI. 58, fig. 20. 



White, very obliquely, flexuously striate, with linear suture; 

 whorls 7, flattened ; columella thick, lip thickened and expanded, 

 not varicose. Length, 4 mill. 



Japan. 

 R. EVANIDA, Nevill. 



White, rather indistinctly, obliquely, longitudinally undulated, 

 narrowly and scabrously spirally striate ; whorls 6, somewhat con- 

 vex ; lip crenulated and varicose. Length, 2*5 mill. 



Andaman Is. 

 R. TENUISTRIATA, Pease. PL 58, fig. 24. 



Solid, white, thinly longitudinally striate, the stride fading below, 

 where they are replaced by spiral lines ; whorls 6-7, subconvex ; 

 aperture subeffuse, with callous columella. Length, 9 mill. 



Paumotus Is. 



The figure is a copy of that originally given for this species, but 

 does not at all correspond with the specimens before me, sent by 

 Pease under this mimr. 



R. DIMIDIATA, Jickeli. PL 58, fig. 22. 



Rather solid, whitish, longitudinally narrowly costulate, the rib- 

 lets fading on upper part of body-whorl, interstices and base of 



