152 PROCEEDINGS OF THE ACADEMY OF [188T. 



cal spire. Whorls 5, slightly convex, the last one rounded or ol>- 

 tusely angulated. Peristome acute. Diam. 9 mill. 

 H. musiva, Gould. 



Helicina viusiva, Gould, Proc. Bost. Soc. Nat. Hist., 1847, p. 

 201 ; Expl. Exp. Shells, p. 98, fig. 107. Pfeiffer, Mon. Pneum., i, 

 p. 368. Gray, Cat. Phan., p. 259. H. and A. Adams, Gen. Moll, ii, 

 p. 302. Mousson, Jour, de Conch., 1865, p. 178 (var. JJveand); 1869, 

 p. 357; 1870, p. 202 (vars. Vitiana ei subcarinata); 1871, p. 25; 

 1873, p. 107 (var. rotundata). Pease, Proc. Zool. Soc, 1871, p. 476. 

 Paetel, Cat. Conch., p. 125 (musica in err.). 



This variable species is abundant beneath decaying vegetation 

 on the lowlands near the sea-shore. It is also common in the Tonga 

 and Viti Islands as well as in the low coral islands of Ellis group. 



The shape varies from depressed globose to sub-lenticular, and, 

 in size varies from 3 to 5 mill, in diameter. The usual color is 

 white, corneous, or pale yellowish horn-color with radiating reddish- 

 chestnut more or less zigzagged or undulating stripes, rarely unicolor. 

 The periphery is rounded, or subangulated and the peristome slight- 

 ly expanded. 



H. altivaga, Mousson. 



Helicina altivaga, "Mousson" Schmeltz, Cat. Mus. Godeff., v, p. 

 99. 



This species, which was neither described nor figured, was found 

 at Upolu, by Dr. Graflfe. 



ASSIMINEA, Leach. 

 A. nitida, Pease. 



Hydrocena nitida, Pease, Proc. Zool. Soc, 1864, p. 674. 



Assiminea nitida, Pease, Jour, de Conch., 1869, p. 165, pi. 7, fig. 

 11 ; Proc Zool. Soc, 1871, p. 476. Schmeltz, Cat. Mus. Godefi*., v, 

 p. 103. Garrett, Proc Phil. Acad. Nat. Sci., 1879, p. 29 ; Jour. 

 Phil. Acad. Nat. Sci., 1881, p. 408. 



f Realia nitida, Pfeiffer, Mon. Pneum., iii, p. 202. 



Hydrocena parimla, Mousson, Jour, de Conch., 1865, p. 184 ; 1873> 

 p. 108. 



Omphalotropis parvula, Pease, Jour, de Conch., 1869, p. 155 ; 

 Proc. Zool. Soc, 1871, p. 476. Paetel, Cat. Conch., p. 124. 



Assiminea parvvla, Pease, Proc. Zool, Soc, 1871, p. 476. Schmeltz, 

 Cat. Mus. Godeff:, v, p. 103. 



