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Show 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, pl. 7. fig. 10 ; Proc. Zool. Soc. 1871, p. 476. Assiminea ovata, " Pease," Schmeltz, Cat. Mus. Godeff. v. p. 103. Hydrocena pygmaa, Gassies, Journ. de Conch. 1867, p. 63. Assiminea pygmaa, Pease, Journ. de Conch. 1869, p. 165. ? Realia pygmaa, 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, 2^-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 3| whorls. Length 1^ millim. 3. ASSIMINEA FISCHERIANA (Gassies). Hydrocena fischeriana, Gassies, Faune Nouv. Caled. 1863, p. 115, pl. 7. fig. 18. Realia fischeriana, Pfeiffer, Mon. Pneum. iv. p. 421. Assiminea vitiensis, Garrett, Amer. Journ. Conch. 1872, p. 225, pl. 19. fig. 14. Abundant on the margins of mangrove-swamps. It also occurs at N e w 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. P A R M E L L A P L A N A T A , H. Adams, Proc. Zool. Soc. 1867, p. 308, pl. 19. fig. 20. " Habitat Fiji Islands." (H. Adams.) NANINA SCORPIO, Gould, Expl. Exp., Shells, p. 33, fig. 67. « Feeiee Islands." (Gould.) Not identified by any subsequent author. It has been referred to the genus Helicarion. |
