A.MPHIPODA. 237 



The si ml antennae have I he lasl 3 joints subequal. 



The o-nathopods agree with Stebbing's description (' " Chall." A.mph.,' p. L501); 

 I could sec no trace of the teeth shown on the carpus in Claus' figure (' Platys- 

 celiden,' p. 47, Plate V!!.. fig. L5) ; this is probably, from his description, exaggerated 

 in the drawing. 



Elsia, Giles, 1888.=* 



Elsia indica, Giles -Plate I., figs. 2. 



Five or six male, female, and young. Length of male 5 millims., female with ova 

 rather less. 



Description of male (now found for the first time): The head is produced and 

 tumid in front, the eyes occupying the posterior half; it is fully as long as the first 4 

 segments. 



Mesosome rather longer than pleon ; the first 2 segments together as long as the 

 3rd, the 5th and 6th longest. The 1st segment of the pleon is longest, the :3rd 

 shortest, the hinder angle of the latter is bluntly rectangular. 



Upper antenna? attached to the extreme edge of the lower part of the front of the 

 head, inflated, with the upper surface depressed and the lower convex. Flagellum 

 minute, apparently 2-jointed (fig. 2. ant. 1 ). 



Lower antenna; of the usual form in males of this family, the 1st joint widened 

 distally ; the 3rd longer than the 4th and 5th, the latter very short. 



No mouth organs or maxillipeds were found. 



Gnathopods alike, small ; 1st joint narrow, margin straight and parallel, longer 

 than the remaining 5 joints ; 2nd and 3rd subequal ; hind margin of wrist extending 

 nearly to the end of that of the hand, like a pair of shears with smooth inner margins ; 

 hand much shorter and narrower than the wrist, tapering slightly to the dactylus, 

 which is very small (fig. 2. gn. '). 



First and 2nd peraeopods very slender, 1st joint as long as and scarcely wider 

 than the 3rd and 4th; margins straight, parallel; 4th and 5th subequal; dactylus 

 minute. 



Third peraeopods very powerful ; 1st joint ovate, about as long as and but little 

 wider than the 4th, narrowing distally ; front margin obsoletely serrate ; 3rd about 

 two-thirds of the 4th, both widening distally ; 4th and 5th subequal in length and 

 width, the 4th rather wider at its distal end, both obsoletely serrate on both margins ; 

 dactylus very minute (fig. 2. pp. 3 ). 



Fourth peraeopods like the third, but rather smaller. 



Fifth peraeopods small ; 1st joint oval, widest near the base, and scarcely as long as 

 the remaining joints ; 3rd about twice as long as 4th ; 5th as long as 3rd and 4th, 

 narrowing distally ; dactylus minute (fig. 2. pp. 5 ). 



* ' Journ. Asiat. Soc. of Bengal,' 1888, p. 250, Plate VI. 



