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Show 1887.] MOLLUSKS OF THE VITI ISLANDS. 311 tinged with red. The sculpture consists of rather coarse, elevated, oblique striae of growth, and closely-set spiral raised lines. The very oblique aperture is subtriangular, and the obtuse peristome is more or less expanded. There are 5 flat whorls, the last one with a prominent compressed acute keel. Diam. 12 millim. 2. HELICINA SEMPERI, Mousson. Helicina semperi, Mousson, Journ. de Conch. 1870, p. 201, pl. 8. fig. 8; Paetel, Cat. Conch, p. 126 ; Schmeltz, Cat. Mus. Godeff. v. p. 98 (as of Graffe) ; Pfeiffer, Mon. Pneum. iv. p. 278. Obtained by Dr. Graffe at Oneata. A solid, smooth, somewhat lenticular, shining species with five flattened whorls, the last one rounded at the periphery, and the colour variable-white, yellow, reddish, frequently with reddish zigzag strigations. Peristome obtusely thickened, and the basal callus white. Diam. 10 millim. 3. HELICINA INTERNA, Mousson. Helicina interna, Mousson, Journ. de Conch. 1S70, p. 201, pl. 8. fig. 6 ; 1871, p. 24; Paetel, Cat. Conch, p. 125; Schmeltz, Cat. Mus. Godeff. v. p. 99 ; Pfeiffer, Mon. Pneum. iv. p. 248. Found by Dr. Graffe in the interior of Viti Levu and at Mango Island. It is also recorded from the Tonga group. A turbinately-conical species of a uniform white or yellowish colour, with or without a spiral reddish-brown zone, and regular conical spire. Whorls 5, slightly convex, the last one rounded or obtusely angulated. Peristome acute. Diam. 9 millim. 4. HELICINA GOMEAENSIS, Garrett. Helicina qomeaensis, Garrett, Proc. Phil. Acad. Nat. Sci. 1873, p. 233, pl. 3. fig. 13. On the foliage of bushes at Gomea Island. A depressedly trochiform, somewhat shining species, with spiral impressed striae. Colour light straw-yellow, rarely with two brownish-red zones. Whorls 5, somewhat convex, last one slightly angular on the periphery. The white peristome is broadly expanded. Diam. 10 millim. 5. HELICINA PALLIDA, Gould. Helicina pallida, Gould, Proc. Bost. Soc. Nat. Hist. 184 7, p. 202 ; Expl. Exp., Shells, p. 96, fig. 113 ; Pfeiffer, Mon. Pneum. i. p. 396 ; Gray, Cat. Phan. p. 290 ; (Pachystoma) H . & A. iVdams, Gen. Moll. ii. p. 303; Mousson, Journ. de Conch. 1865, p. 197, 1870, p. 200; Paetel, Cat. Conch, p. 125; Schmeltz, Cat. Mus. Godeff. v. p. 74. 1 found a few examples of this species at Vanua Levu, Kioa, and Vanua Balavo. On foliage. A cinereous or pale yellowish-white species, more depressed than the preceding one, the whorls flatter, the last one angular, the |
