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Show 286 MR. A. GARRETT ON THE TERRESTRIAL [Mar. 1, The Viti shells, which are a little smaller than Sandwich-Island specimens, do not differ from the latter except in having in some examples one or two more denticles or plicae on the parietal wall, and the base more distinctly impressedly striated. It may be recognized by its ovate shape, smooth shining surface, dark chestnut or olive-brown colour, short, convexly conoid spire, and mucronated apex. On the lower portion of the parietal region may be observed two approximating folds, the lower one the smaller and occasionally wanting. There are usually one or two small denticles above, and the palate has five to seven laminae. The columella-fold is continuous with the basal portion of the peristome. M. granum, Gassies, is either the same as M. parvulus or very closely related. 4. MELAMPUS TONGAENSIS, Mousson. Melampus tongaensis, Mousson, Journ. de Conch. 1871, p. 22, pl. 3. fig. 8; Schmeltz, Cat. Mus. Godeff. v. p. 88; Pfeiffer, Mon. Pneum. (Auric.) iv. p. 316. A number of examples were taken in the same station as the preceding species. Dr. Graffe found the type specimens at Tongatabi., one of the Tonga Islands. Prof. Mousson has described a variety pallidula (I. c.) from Vavao in the same group. It is very closely allied to, and perhaps only a form of, M. parvulus. It is about the same size and colour, but is a little more oblong in shape and the spire more produced. The dentation and plicae are the same in the two species. 5. MELAMPUS SEMISULCATUS, Mousson. Melampus semisulcatus, Mousson, Journ. de Conch. 1869, p. 347, pl. 15. fig. 2; Paetel, Cat. Conch, p. 114; Schmeltz, Cat. Mus. Godeff. v. p. 88 ; Pfeiffer, Mon. Pneum. (Auric.) iv. p. 318 ; Pease, Proc. Zool. Soc. 1871, p. 477- Occurs on the margins of mangrove-swamps, where I gathered thousands of specimens. I also obtained it iu similar stations at Upolu, one of the Samoa Islands. This species is of an oblong pear-shape and a uniform cinnamon colour; it has a short, usually eroded, spire, and is spirally grooved, the grooves being more or less evanescent on the middle of the body-whorl. There are three folds in the parietal region and usually two lamina in the palate. Length 11 millim. 6. MELAMPUS SCULPTUS, Pfeiffer. Melampus sculptus, Pfeiffer, Proc. Zool. Soc. 1859, p. 29; Mon. Pneum. (Auric.) iv. p. 316. Melampus f ricki, Pfeiffer, Proc. Zool. Soc. 1859, p. 29; Mon. Pneum. (Auric.) iv. p. 304 ; Pease, Proc. Zool. Soc. 1871, p. 477. Melampus semiplicatus, Pease, Proc. Zool. Soc. 1860, p. 146, 1869, p. 60 (animal), 18/1, p. 477; Pfeiffer, Mon. Pneum. (Auric.) iv. p. 304; Schmeltz, Cat. Mus. Godeff. v. p. 88; Layard, Cat. Land and Freshw. Moll. N. Caled. p. 4. |