1855.] Proceedings of the Asiatic Society. 713 



also Leiosomus marmoratus, Swainson apud Bleeker, sed loc. non cit.) 

 The last three species, common in Bengal, were not observed by Dr. 

 Cantor further south, in the Malayan peninsula ; and they were obtained 

 by Mr. Theobald in Mergui. The same remark applies to one or two of 

 the reptiles, as especially Coluber mucosus. 



Of Mollusca, an extensive collection of land and fresh-water shells, 

 which (together with those presented by Capt. Berdmore from Pegu) has 

 considerably enriched our cabinet, which previously contained few species 

 from that range of country. 



Lastly, of Crustacea, a small Squilla, which approximates the descrip- 

 tion of Sq. micropthalma, M. Edw., Hist. Crust. II, 523 ; but the griffes 

 (or seizers) are armed on the last articulation with 5 teeth, the first of 

 which is unusually elongated, and there are also 3 moveable spines towards 

 the base of their penultimate articulation : thorax remarkably short, and 

 much contracted anteriorly : eyes as described of Sq. micropthalma ; 

 the cornea minute : six very slight ridges along the abdomen ; and its 

 last segment bearing a mesial ridge, and numerous tubercles more or less 

 united into vermiculated raised lines, with 6 principal spines posteriorly 

 and other and smaller spines between them. Entire length, from ocular 

 peduncles, 3| in. If new, Sq. biarmata, nobis. 



We may now proceed to notice the various notabilia contained in the 

 collections presented by Capt. Berdmore and Mr. Theobald. 



Emys nigra, nobis, n. s. To judge from the shell alone, this species 

 would seem to be affined to E. crassicollis ; but Mr. Theobald assures 

 us that it is not remarkable for thickness of neck. What appear to be 

 adults, measure from 6f to 7\ in. long. The young have a prominent 

 mesial ridge above, continued throughout ; and two slight and proximate 

 lateral ridges, similar to those of E. crassicollis but less developed. In 

 the presumed adults these ridges appear to be worn away, as if by attri- 

 tion ; and even the mesial disappears excepting on the last and penul- 

 timate of the vertebral plates. Nuchal plate quadrilateral, and broader 

 -posteriorly ; shewing a distinct ridge in the young : first vertebral elon- 

 gate-triangular, with base to the front and truncate apex ; the next two 

 similar but broader, with anterior base rounded almost to a semi-circle ; 

 the fourth more or less hexagonal; and the fifth triangular with posterior 

 base : caudals large and square : posterior marginal plates strongly ser- 

 rated in the young, with four denticulations on each side, successively 

 diminishing to the middle : of the sternal plates, the third pair are more 

 than twice as large as the second ; whereas in E. crassicollis the second 

 pair are as large as, and often larger, than the third. In the adults, the whole 



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