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Show 1887.] MOLLUSKS OF THE VITI ISLANDS. 179 3. PATULA PRINCEI. Helix princei, Liardet, Proc. Zool. Soc. 1876, p. 100, pl. ngs. 4, 4a. > r > r This species was found at Taviuni by Mr. Liardet. Shell very small, depressed, with a wide and perspective umbilicus ; colour dark brown; whorls 3, prominently costulated ; suture deeply impressed ; aperture round." (Liardet.) 4. PATULA IRREGULARIS, sp. nov. Pitys irregularis, Mousson, Mus. Godeff. 1885. Shell small, umbilicated, orbicular, depressed, thin, translucent greyish white under a bluish horn-coloured epidermis; sculpture consisting of crowded, waved, raised strias, with larger ones irregularly intermixed; spire convex, apex flattened; suture canaliculate; whorls 4, convex, slowly and regularly increasing, slightly turgid next the suture, last one rounded, slightly depressed above the penpnery; base convex; umbilicus deep, about one fourth the major diameter of the shell; aperture slightly oblique, irregularly rounded ; peristome thin. J Major diam. 3, height 2 millim. Common at Viti Levu. I received a number of specimens of this species from the Museum Godeffroy, Hamburg. A small uncoloured species closely allied to P. rudis, a Cook's Island species. The irregular striae will separate it from the other Vitian species. Genus PITYS, Beck. 1. PITYS SUBD.EDALEA. Patula (Endodonta) subdadalea, Mousson, Journ. de Conch 1870 p. 117, pl. 7. fig. 6. ' ' Helix subdcedalea, Pfeiffer, Mon. Hel. vii. p. 258 • (Patula) Paetel, Cat. Conch, p. 95. ' Found by Dr. Graffe in Mango Island. Like all the South-Sea species, it is found beneath decaying leaves and under rotten wood. It is a little larger than Patula adposita, and of a pale horn-colour, with a wide umbilicus, planulate spire, the striae costulate, and 51 whorls. The parietal region is garnished with three spiral laminae, and there are four on the palate. Genus PLACOSTYLUS, Beck. 1. PLACOSTYLUS MALLEATUS. Bulimus malleatus, Jay, Revue Zool. 1842, p. 80; Guerin, Mag Zool. 1843, p. 61 ; Philippi, Abbild. ii. 9. p. 10, Bui. pl. 3. fig. 4 Pfeiffer, Mon. Hel. ii. p. 55 ; (Charis) id. Yers, p. 152 ; Reeve, Conch Icon. pl. 29. fig. 174 ; Deshayes, in Fe'r. p. 47, pl. 144. figs. 11, 12 Gould, Expl. Exp., Shells, p. 81, fig. 78; (Charis) Albers, Die Hel. 1st ed. p. 152, 2nd, ed. p. 196 ; (Charis) H. & A. Adams, Gen. Moll. ii. p. 147 ; (Charis) Chenu, Mon. Conch, i. p. 436, fig. 3201] |
