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Show 1900.] FROM SINGAPORE AND MALACCA. 747 of external maxillipedes with a longitudinal groove near its inner margin; merus with its external angle much dilated, this dilatation separated off by a broad groove. All the under surface, maxillipedes, abdomen, & c , clothed with pubescence, with longer hairs in places. The antero-lateral teeth are partially hidden by a line of long, thickly placed hairs, arising just below the margin of the carapace. Merus of chelipedes with its anterior half visible from beneath the carapace ; upper surface concave and faintly pubescent where it is applied to the carapace, somewhat rounded aud more densely pubescent in front, Anterior margin with long hairs, and five teeth ; one of these is placed about the centre of the margin ; behind it are three placed very close together, closer to each other than the first of them is to the spine in the centre of the margin, the first being tbe same size as that in front, the two behind it being equal and half the size. Posterior margin convex, with long hairs, and a single small tooth at the distal end. Carpus externally pubescent, and costate ; with a strong spine at its inner angle, and a smaller one on its lower outer surface. Hand rather thick, everywhere pubescent, externally with three strong costas, and above with two, less strong costas, none of them pubescent ; the internal costa of the upper surface bears a single, forwardly directed spine at its distal extremity, between the two next costas there is a similar spine at the angle of the joint, and tbe lowermost costa is continued on to the immobile finger. Each of the fingers presents five costas, all perfectly smooth, except the uppermost one on the dactyl, which is evenly granulate at the base. Inner margins dentate, teeth strong and laciniate; tips decussate. Ambulatory legs much compressed, dactyls styliform ; under margins of all the joints lined with hairs. Colour dull yellow, granules lighter than pubescence; teeth of meri and antero-lateral margins with their bases red and their tips white. Dim. 50x34-5. Base of chelipede to tips of fingers .... about 75 m m . Length of hand about 16 m m . Length of dactyl of hand about 16 m m . XXXIX. Genus GONIOSOMA A. M.-Edw. 64. G O N I O S O M A AFFINE Dana. Charybdis affinis, Dana. U.S. Expl. Exped., Crust, pt. i. p. 286, pi. xvii! f. 12 (1852). Goniosoma affine, A. M.-Edw. Arch. Mus. t. x. p. 384 (1861); de Man, Mergui Crust, p. 80, pi. v. f. 2 (1888); Henderson, Trans. Linn. Soc, Zool. vol. v. p. 374 (1893); de Man, Zoolog. Jahrb. Bd. viii. p. 559 (1895). Hab. Singapore ; sandy shore. One male example. In this individual the merus of the left chelipede has the typical three spines on its anterior border, the most posterior being smaller than the two in front; on the right side, however, |
