1888.] G. M. Giles — Notes on the Amphipoda of Indian Waters. 251 



subequal, simple, and slender, and as long as the first five thoracio 

 segments ; the posterior border of their propodites are weakly denticu- 

 lated. The sixth and seventh pair closely resemble each other, but 

 the sixth is somewhat the larger, being as long as the entire abdomen. 

 Their basipodites are short and broad and the anterior border of their 

 propodites is markedly denticulated. The eighth is much smaller, and 

 more than half its length is formed by the broad and fairly stout 

 basipodite, the remaining articulations being very small and scarcely 

 definable from each other. In all the thoracic appendages the dacty- 

 lopodite is extremely minute. Simple branchial sacs are attached to 

 the 5th, 6th, and 7th thoracic appendages. 



The first three abdominal appendages are stout, their protopodites 

 being especially long, while their rami are short and but ill-provided 

 with marginal hairs. The last three pairs are stout with styliform 

 rami ; all three reach to an equal length beyond the posterior extremity 

 of the abdomen. 



11, Caprella madrasana, n. sp., PL XII, Figs. 1 & 2, d* ? . 



Three specimens of this form, two males and one female, were taken 

 in the drift net lowered nearly to the bottom in 6 — 9 fathoms off the 

 " Seven Pagodas " Madras, and afterwards in a similar depth in Palk's 

 Straits. 



The animal (with the exception of the eye, which is of a deep pur- 

 ple tint) is of a dirty white colour thronghout, and is very small, the 

 males measuring only 3 and the females only 4 mm. in length ; and in 

 general outline resembles G. linearis, although its nearest ally is probably; 

 G. geometrica. The body is quite smooth without tubercles or spines, 

 the head is rounded and unprovided with any rostrum, and presents a 

 somewhat pear-shaped outline when viewed laterally, being deeper than 

 long. 



The first segments of the thorax are very long and slender in both 

 sexes, the first being as long as the head and united to it by a visible, but 

 apparently immovable, suture. The second is as long as the head and 

 the first segment together, and the third, fourth, and fifth progressively, 

 longer, the last forming fths of the entire length of the animal. The. 

 sixth segment is nearly as long as the second, and the seventh very 

 short. 



The rudimentary abdomen is represented only by two or three very 

 indistinct rings, and no rudiments of its appendages can be made out 

 with the exception of a short projection armed with a small articulus 

 (or hair ?) from the penultimate ringlet. 

 33 



