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Show 352 LIEUT.-COL. H. H. GODWIN-AUSTEN ON [June 18, I have much pleasure in naming it after Mr. John Evans, who did so much to promote the exploration of the Bornean caverns. PUPINELLA, Gray. Pupinella borneensis, Pfr. Pupinella borneensis, Pfr. P. Z. S. 1861, p. 389, pi. xxxvii. fig. I. MEGALOMASTOMA, Guilding. Meyalomastoma dorice, Issel. Meyalomastoma dorice, Issel, Moll. Born. Ann. Mus. Civ. Genova, vi. p. 430, pi. vi. figs. 18, 19 (1874). Hab. Sarawak (Doria and Beccari). Five examples. 57. MEGALOMASTOMA ANOSTOMA, Benson. Cyclostoma anostoma, Benson, Ann. & Mag. Nat. Hist. ser. 2, x. p. 269 (1852). Meyalomastoma anostoma, Issel, Moll. Born. Ann. Mus. Civ. Genova, vi. p. 429, pi. vi. figs. 16, 17 (1874). Cyclostoma sectilabrum, Mart. u. Chemn. Conch.-Cab. ed. ii. p. 377, pi. xlvii. figs. 11, 12. Cyclostoma leferi, Morelet, Journ. de Conch. 1861, p. 176. Megalomastoma lowei, Sowerby, Thesaur. Conch, iii. pi. cclxiii. fig.l. Hab. Trusan and Niah Hills (Everett). HELICINA, Lamarck. 58. HELICINA USUKANENSIS, n. sp. (Plate XXXIX. fig. 7.) Shell dextral, lenticular, solid, convex below ; sculpture nearly smooth, fine lines of growth, crossed by irregular diagonal striation ; colour pale ruddy madder-brown, pale straw-colour below and ou periphery, an indistinct band seen inside the aperture; spire depressedly pyramidal, sides flatly convex ; apex blunt; suture linear; whorls 4, regularly increasing, sides very flat, the last bluntly carinate, with an obsolete band below; aperture acute, white, slightly reflected; columellar margin short, thickened, the callous short and semicircular. Size: maj. diam. 7 10; alt. axis 3*75 millim. Hab. Usukan Island, Borneo (A. Everett). This species approaches very near to H. martensi in form of the columellar margin, but differs in colour and the form of the carinate periphery, as also in its flatter-sided spire. Helicina borneensis, v. Martens. Helicina borneensis, v. Martens, Monatsber. d. Berlin. Akad. 1864, p. 120; Reeve, Conch. Icon. pi. xxx. fig. 267 (1873). Hab. Singkawang (v. Martens). Helicina crossei, Semper. Hab. Palawan. In Brit. Mus. |