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Show 450 LT.-COL. H. H. GODWIN-AUSTEN ON THE LAND- [May 21. I have lately, in a paper read at the Malacological Society, referred to the distinctness of this genus Sivella, constituted by W . T. Blanford for the Indian species castra, which he made the type. It differs in every respect from Discus, represented by bicolor, sulcipes, &c.; the anatomy of the latter I have been able examine in specimens sent me by my brother from the Nicobars. Genus TROCHOMORPHOIDES. 1. TROCHOMORPHOIDES CONULUS, Martens (p. 442). Katchall (de Roepstorjf). Size : maj. diam. 11*2, min. 10-2; alt. axis 11*0 mm. Genus AMPHIDROMUS. 2. AMPHIDROMUS ANDAMANICUS, var. NICOBARICA, Nev. MS., Hand-list, p. 127 (p. 443). Of this species I have one specimen from Katchall. It is somewhat larger than Andaman shells, and in colour is far paler and with few markings, and those pale. These differences might not hold good in a large series. Genus ENNEA. 2. E N N E A (HUTTONELLA) MOERCHIANA, De Roepstorff MS. Nevill, Hand-list M S . (p. 443). This species comes nearest to E. stenopylis of the N.E. frontier. Genus STREPTAXIS. 1. STREPTAXIS ANDAMANICUS, var. (p. 443). This species comes near S. blanfordi, Theobald. From Arakan and Pegu. Genus PUPA. 1. PUPA (PUPISOMA) CONSTRICTUS, n. sp. (p. 443). Locality. South Andaman (de Roepstorff). Shell turbinate, perforate ; sculpture minutely costulate above, from the swollen portion forwards the surface is smoother; colour, pale ochraceous; spire conic; sides flat; apex pointed; suture impressed ; whorls 5, convex, at the distance of half a turn in the spiral behind the aperture there is a sharp swelling of the whorl, marking apparently the position of the previous aperture, but this is not seen in any of the whorls above; aperture ovate, oblique; peristome much thickened and reflected, united by a thin callus on the body-wKorl; sinuate below and on outer margin. Size: maj. diam. 2*1; alt. axis 2*2 mm. Animal not yet seen, and it is difficult to say where this species should find generic position. I sorted out from a tube full of |