1887.] MOLLUSKS OF THE VITI ISLANDS. 315 



Assiminea parvula. Pease, Proc. Zool. Soc. 1871, p. 476 ; 

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



Realia parvula, Pfeiffer, Mon. Pneum. iii. p. 213. 



Assiminea lucida. Pease, Journ. de Conch. 1869, p. 166, pi. 7. 

 fig. 10 ; Proc. Zool. Soc. 1871, p. 476. 



Assiminea ovata, " Pease," Schmeltz, Cat. Mus. Godeff. v. p. 103. 



Hydrocena pygmcBa, Gassies, Journ. de Conch. 1867, p. 6.3. 



Assiminea pygmcea, Pease, Journ. de Conch. 1869, p. 165. 



? Realia pyymcEa, Pfeiffer, Mon. Pneum. iv. p. 214. 



Hydrocena similis, Baird, in Cruise of the ' Curagoa.' 



This small species is generally distributed throughout all the 

 groups from the Paumotus to the Viti Islands and New Caledonia, 

 and ranges from near the sea-shore to about 2000 feet above the sea- 

 level. They are found beneath decaying leaves, under stones and 

 dead wood. 



It may be recognized by its small size, 25-4 millim. long, smooth, 

 shining surface, ovate-conical form, light or dark corneous colour, 

 rarely with a faint transverse band on the last whorl. 



2. Assiminea brevissima (Mousson). 



Hydrocena brevissima, Mousson, Journ. de Conch. 1870, p. 194. 

 Found by Dr. Graffe at Vanua Balavo. 



A minute, broadly conical, thin, pellucid, shining, pale reddish 

 horn-coloured species with 3g whorls. Length 1| millim, 



3. Assiminea fischeriana (Gassies). 



Hydrocena fisclieriana, Gassies, Faune Nouv. Caled. 1863, p. 115, 

 pi. 7. fig. 18. 



Realia fischeriana, Pfeiffer, Mon. Pneum. iv. p. 421. 



Assiminea vitiensis, Garrett, Amer. Journ. Couch. 1872, p. 225, 

 pi. 10. fig. 14. 



Abundant on the margins of mangrove-swamps. It also occurs 

 at New Caledonia. 



Shaped like A. nitida, but larger, darker coloured, with or without 

 one or two pale bands on the body-whorl. 



The following species, though quoted as Viti shells, have been 

 found neither by Dr. Graffe nor by myself. Their existence in the 

 group certainly needs confirmation. 



Parmella planata, H. Adams, Proc. Zool. Soc. 1867, p. 308, 

 pi. 19. fig. 20. 



" Habitat Fiji Islands." (//. Adams.) 



Nanina SCORPIO, Gould, Expl. Exp., Shells, p. 33, fig. 67. 



" Feejee Islands." {GoulJ.) 



Not identified by any subsequent author. It has been referred 

 to the genus Helicarion. 



