452 



Records of Ihe Indian Museum. [Vol. XXIV, 



depression in the mid-dorsal line. In the median line of the 

 cephalothorax about midway between the cervical groove and 

 the anterior end of the frontal plate there is a trace of a tubercle, 

 more marked in the female than in the male but much less pro- 

 minent that Hansen figures in S. nodosa. Cervical groove well 

 marked, especially on the posterior margin. Eyes moderately 

 large, pigment black. Antennular peduncle exhibiting sexual 

 differences, the last joint in the male being longer and thicker than 

 iu the female and bearing the usual brush of setae. Antennal scale 

 reaching the distal end of the antennular peduncle in the female, 



n> x a,. 



Text-fig. ^.—Siriella brevicaudata Paulson. 

 a, first pleopod of male; h, second pleopod of male; c^uropods ; d, telson 

 e, apex of the telson ; f, apex of the telson from below, a-d X 33, e X 6=;, 

 f X 400. 



falling somewhat short of this in the male, three times as long as 

 broad, terminal lobe about one quarter of the scale in length and 

 as broad as long, outer margin terminating in a strong spine, one 

 prominent spine on the outer distal corner of the joint from which 

 the scale springs. First and second thoracic limbs (gnathopods) 

 stout, with the dactylus remarkably long, robust and strongly 

 curved. Third thoracic limbs much more robust that the re- 

 mainder due to the expanded merus and carpus. Posterior 

 thoracic limbs much more slender and linear, tarsus unjointed. 

 Telson remarkably short, when in position not extending much 



