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Show 1900.] FROM SINGAPORE A>D MALACCA. 765 another; but the cardiac region is always more or less distinct, and the hepatic regions always project slightly in a lateral and obliquely downward direction, so as to break the plane of the antero-lateral margins. Dim. d 14-5 x 15. d 13-75 x 13-5. d 12'5 x 13. d 13 x 13. d 10-5x10-5. d 9-75x10. d 12-5x12-75. d 13x12-75. $15-25x15. $11-5x11-5. $11-5x11. $9x9. $13x13, $ 11-5x11-25. 105. PHILYRA SEXANGULA Alcock. Philyra sexangula, Alcock, Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, p. 241, & pt. ii. No. 3, pi. vii. f. 2 (1896). Hab. Singapore : from mud, at low water. A female with ova. Mr. Alcock's description is from a male; in this female I note the following differences :-The median carina is raised into four low tubercles over the cardiac and mesogastric regions ; the teeth at the outer edge of the posterior margin are not very strong ; the black colour of the carapace shades off to a dull yellow-green in the anterior half, commencing at the anterior termination of the branchial carinas ; the finger-tips are white, and the four posterior pairs deep yellow. As regards the abdomen, it is composed of three distinct pieces : a narrow basal segment; a long, broad, dome-shaped median piece, composed of segments 2 to 6, segment 2 being still clearly marked off by a transverse groove; and the 7tb segment, very small and rounded triangular. Segments 1 and 2 are obtusely carinated transversely; the whole abdomen is honeycombed and pubescent like the carapace, and uniformly black, except the 7th segment and the anterior and lateral margins of the middle piece, which are nearly white. Dim. 9-75x9-5. Length of middle piece of abdomen.. .. 7*0 mm. Breadth „ „ „ .... 6-0 „ Length of chelipede 20-5 „ LVIII. Genus PSEUDOPHILYRA Miers. 106. PSEUDOPHILYRA MELITA de Man. Pseudophilgra melita, de Man, Mergui Crust, p. 199 (1888); Henderson, Trans. Linn. Soc, Zool. vol. v. p. 397 (1893); Alcock, Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, p. 253 (1896). Hab. Uncertain. One female. I have no doubt that this specimen belongs to P. melita; but the following-possibly sexual-differences may be noted. The surface of the carapace is nowhere granular, but everywhere fairly closely punctate, the punctas being distinct, and quite visible to the naked eye. The distal third of the upper and under surfaces of the arm, and the wrist, both above and below, are also punctate, PROC, ZOOL. Soc-1900, No. L, 50 |