528 Memoirs of the Indian Museum. [Vol. V, 



"nagellum rather stout and usually with 8 or 9 joints; the second antenna has the 

 last two joints of the peduncle somewhat thickened and provided with long setae ; 

 the flagellum in the female is shorter than the peduncle and consists of four joints; 

 in the male it is very slender and very long, the whole antenna being about three- 

 fourths the length of the body. The branches of the uropods are slender, sub- 

 equal, and with the extremities very acute ; a few setules are present on the pedun- 

 cles and sometimes also on the branches, particularly on those of the third ; Sars says 

 those of the third are quite unarmed. 



Walker says that his P. serra from Ceylon much resembles P. longimanus but 



he describes the rostrum as being much longer 

 than it is in the Chilka Lake specimens. The 

 differences in the proportions of the segments of 

 the peraeon are perhaps not important but he 

 describes the outer ramus of the first uropod as 

 half as long as the inner and the upper margins 

 of the rami in adults strongly serrate. In my 

 specimens the branches are subequal and though 

 there may be a slight appearance of serration 



Fig. 2.-Perioculodes longimanus, formed by the shallow notches from which the 

 antennae of female. setules arise these are much less numerous and less 



conspicuous than in his figure. 

 Monoculodes megapleon Giles was described from a single specimen obtained off 

 Chittagong. From Dr. Giles' description it seems to be the same species as the 

 Chilka specimens and in some points to agree better with P. longimanus. Stebbing 

 (1906, p. 238) says of it "perhaps identical with P. longimanus." 



Oedicerus puliciformis Giles (1888, p. 248) is merely mentioned by Stebbing (1906, 

 p. 742) ; if we disregard the difference in the description of the eyes, which may be 

 due to the condition of the specimens, there does not seem to be anything in the 

 figure to prevent Dr. Giles' specimen being a male of the species now under consi- 

 deration, i.e. P. longimanus, the enlarged figure he gives of the terminal portion of 

 the gnathopod agrees precisely with that of the Chilka specimens. Unfortunately 

 for this suggestion, however, his specimen was described as a female carrying ova, 

 though it was only 2 mm. long. 



[A very abundant species in the main area on a muddy bottom some distance off 

 shore. N.A.] 



Synchelidium haplocheles (Grube). 



Synchelidium haplocheles Stebbing, 1906, p. 242. 

 Synchelidium- haplocheles Chevreux, 1911, p. 206. 

 Synchelidium brevicarpum Walker, 1904, p. 263. 



Locality : — 2 to 8 miles N.B. |E. of Kalidai. A few specimens. 



I think these specimens must be referred to the species named above. The 

 male specimen dissected has the rostrum and antenna agreeing exactly with the 

 description given by Stebbing and with Sars' figures, except that the first joint of the 



