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Show 1887.] MOLLUSKS OF THE VITI ISLANDS. 167 Major diam. 15 to 21 millim. Gould's first name being preoccupied by Lowe for a Madeira Helix, he changed it to casca. 3. NANINA PFEIFFERI. Helix pfeifferi (Naninal), Philippi, Arch. f. Nat. 1845, p. 62 ; Chemnitz, 2nd ed. Helix, pl. 31. figs. 9-10; Pfeiffer, Mon. Hel. i. p. 54; Reeve, Conch. Icon. no. 1282, pl. 185. Nanina pfeiferi, Gray, Cat. Pulm. p. 94 ; (Xesta) Albers, Die Hel. p. 59 ; H. & A. Adams, Gen. Moll. ii. p. 223 ; (Xesta) Pfeiffer, Vers, p. 120; (Xesta) Mousson, Journ! de Conch. 1870, p. 111. Helix lurida, Gould, Proc. Bost. Soc. Nat. Hist. 1846, p. 179 ; Pfeiffer, Mon. Hel. i. p. 4 7. Nanina lurida, Gould, Expl. Exp., Shells, p. 31, fig. 68 ; Gray, Cat. Pulm. p. 128; (Hemiplecta), H. & A. Adams, Gen. Moll. ii. p. 223 ; (Xesta) Paetel, Cat. Couch. 1873, p. 85 ; Mousson, Journ. de Conch. 1865, p. 190; Schmeltz, Cat. Mus. Godeff. v. p. 71. I received many examples of this species from a missionary who collected them at Kantavu. Dr. Graffe obtained specimens iu Viti Levu. Though I have followed Pfeiffer and Mousson in referring this species to pfeifferi, still I have some doubts as to their being the same species. Pfeiffer and Deshayes assign it to China, and Cuming erroneously cites the Sandwich Islands as its habitat. Though nearly as large as nouleti, it may be distinguished by its light colour, more depressed whorls, and smooth surface. 4. NANINA FRAGILLIMA. Nanina (Xesta) fragillima, Mousson, Journ. de Conch. 1870, p. 112, pl. 7. fig. 3 ; (Microcgstis) Paetel, Cat. Conch. 1873, p. 84. Helix fragillima, Pfeiffer, Mon. Hel. vii. p. 91. I am indebted to Dr. Graffe for examples of this species which he obtained in the interior of Viti Levu. It is also recorded from Kantavu. It is a thin, transparent, shining, pale horn-coloured species with a depressed spire and strongly convex base. The last whorl is conspicuously angulated. Major diam. 14 millim. 5. NANINA SIMILIS. Euripus similis, Semper, Phil. Landmoll. i. p. 37, pl. 1. fig. 18, pl. 2. fig. 91. Nanina (Euripus) similis, Schmeltz, Cat. Mus. Godeff. v. p. 91. Helix similis, Pfeiffer, Mon. Hel. vii. p. 112. This species, which is unknown to me, was collected by Dr. Graffe on Viti Levu. It is described as a solid, orbicular, depressed shell of a fuscous horn-colour, with irregular fuscous lines ; whorls 5g, the last one obsoletely angulated just above the periphery. Diam. 17, height 10i millim. |