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Show 1895.1 MOLLUSCA OF T H E A N D A M A N AND NICOBAR ISLANDS. 455 Genus ALYCEEUS. 2. ALYCEEUS REINHARDTI, Morch (p. 445). The type of this species is from Great Nicobar Island and is larger than the species from Camorta, named by Morch var. minor, only averaging 4 mm. in diameter. The latter differs also in the form of the aperture, which is more circular and simple, the external peristome not being expanded and inflected, particularly below. The form from Katchall is nearly as large and like that from the Great Nicobar. 3. ALYoaEUS BUSBYI, G.-A. (p. 445). This species was described in the Society's 'Proceedings' for 1893, p. 595. Genus OMPHALOTROPIS. 6. OMPHALOTROPIS (REALIA) BREVIS, n. sp. (p. 445). Locality. Camorta, Nicobars (de Roepstorff). Shell dextral, elongately turbinate, rimate; sculpture smooth, covered with a fine epidermis, having a few indistinct lines of growth ; colour pale yellowish horny; spire conical, sides flat; apex sharp ; suture impressed ; whorls 6, the last slightly carinate with a hair-like keel, which is seen in the whorl above; below a, hairlike keel round the umbilical region; aperture ovate; peristome thin, not complete in specimen. Size: maj. diam. 1*8 ; alt. axis 2*8 mm. Animal. One specimen was in a tube with a label by Nevill: " beats me, please send others." Camorta. In sorting out tubes full of mixed species I found two others inside two examples of Microcystina. It is so much smaller than any species of this genus from these islands, although not quite adult, that I have no hesitation in naming it. Genus PUPINA. 1. PUPINA NICOBARICA (p. 445). Under this name Nevill gives two varieties in his MS. Catalogue: var. nana, long. 4*6, alt. 2*5 mm., Great Nicobar, and var. evertata, from de Roepstorff, from the same island. As I have pointed out in the • Land and Freshwater Mollusca of India,' p. 45 (1882), the genus Sagdinella of Morch will not stand; his S. didrichsenii turns out to be an operculated form. There are some 20 specimens in Mr. de Roepstorff's collection, in seven of which I detected the operculum. This is multispiral, of about 4 whorls, and very thin; further examination showed that the shells were young Pupince; the operculum also corresponded. In some shells of Pupina nicobarica and in the white variety albina |