FEOM SINGAPOEE A^^D XEW ZEAXAj^D. 205 



first joint squarely rounded, crenulate, and spined posteriorly — the measurement from 

 the front to the hind margin much exceeding that of the corresponding joint in the 

 third and fourth perseopods; third joint only moderately expanded distally; fourth 

 of nearly the same length as third, nearly parallel-sided ; the hand and finger as in the 

 fourth peraeopod, but both shorter. 



The branchiae are small and variously twisted ; those of the third and fourth peraeo- 

 pods appear to be the largest. 



The pleopods appear to be feeble and laminar, with long peduncles spined on the 

 outer edge and, for a short distance near the base, also on the inner edge. The slender 

 rami have spines on the long basal joints and plumose setae of no great length on the 

 terminal joints, which number about six. 



The first uropods have the peduncles longer than the rami, fringed along two edges 

 with spines, with some extra spines about the base ; the rami, projecting about equally 

 far, are armed along their margins with spines, which increase in length distally, and 

 with some slightly incurved spines at the apex. There is a second row of smaller spines 

 on the inner ramus. 



The second uropods have the peduncle springing from what looks like a short basal 

 joint. The ordinary peduncular joint is spinous on both margins. The rami are sub- 

 equal in length to one another and to the peduncle, or, as on one side of the specimen 

 examined, a little longer than the peduncle. 



The third uropods have short stout peduncles, spined on the outer edges, projecting 

 but little, or not at all, beyond the telson. The single ramus is armed round the outer 

 and distal edges with twelve spines, as in one of the pair of uropods examined, or ten as 

 in its fellow. 



The telson has a straight base-line, the sides curving round to a flattened apex; its 

 breadth at the base and length down the centre are about equal ; a ring of small spines 

 is set not quite symmetrically round the lower half. 



The general form of the body, as seen from above, is much inflated, tapering strongly 

 from the fourth peraeon-segment to the telson. The first pleon-segment is spined round 

 the lower margin to the lower hinder angle, beyond which the hinder margin bulges 

 out, with one or two minute spines in its course. In the second and third segments 

 the series of retroverted spines round the lower front margin does not come near the 

 lower hinder angle, which has a spine of its own. The back margin in each of these 

 segments is armed with spines, and is nearly perpendicular to the lower margin. There 

 are spines on the inner surfaces. The fourth pleon-segment is dorsally saddle-shaped, 

 although this form is not observable till the segment is withdrawn from its partial 

 concealment under the third. The fifth is dorsally overlapped by the fourth, and the 

 sixth, which is ventrally and distally bilobed, shows no dorsal portion, the telson appa- 

 rently usurping its place. 



The skin-markings correspond with those figured by Spence Bate for Talitrus locusta ; 



