94 lUSSOIDiE. 



78. Rissoina semiplicata. 



Rissoina semiplicata, Pease, P. Zool. S. 1862, Howland Is,, long. 8~, dlam. J^ 

 mil., and Am. J. Conch. Ill, pi. XXIV, fig. 29 ; Conch.-Cab. II, jpl. 15 A, 

 fig. 2. 



1 Upolu ; ex Mus, GodefFroy [4, If]. 

 3 Paumotus ; coll. H. Pease, Esq. 



Possibly better classed as a var. of the preceding, the two 

 denticulations within the aperture are quite distinct, though 

 not I'ecorded in Pease's descriptions. It can always be dis- 

 tinguished by the markedly shorter spire, more tumid last 

 whorl, less everted aperture and especially by the ribs on the 

 penultimate whorl ; the above will also distinguish it from 

 R. coronata, Reel., possibly a mere var. of B. hideukUa. 



79. Rissoina moravica. 



Eissoina moravica. Homes, Foss. Moll. Tert. Wien, 1856. 



1 Steinabrunn ; coll. Herr Schwartz von Mohrenstern. 



80. Rissoina peasiana. 



Rissoina peasiana, G. Nevill, Weinkaiiff, Conch.-Cab. II, ISSl, pi, ISA 

 fig. 6, Rarotonga. 



A fine species of ten whorls, quite distinct from U. tridentata 

 [=curta], the whorls are scarcely convex, the last five whorls 

 smooth, the three preceding coarsely ribbed ; no teeth within 

 the aperture, a small dentiform thickening on the parietal mar- 

 gin, near the outer lip ; some resemblance to R. macrostoma, 

 l)esh. [fossil]. 



Long, 12, diam. 6 mil. [the two apical whorls wanting]. 



1 Rarotonga [type] ; ex Mus. Godeffroy [as " R. ? curta. Sow."] 



81. Rissoina subulina. 



Rissoina subulina, WeinJcauff, Conch.-Cab. II, 1881, pi. 15A, fig. 3, Japan 

 — long. 5|, diam. 1\ mil. 



2 Japan [type] ; ex Mr. R. Damon [" coll. A. Adams "]. 



