82 Memoirs of the Indian Museum. [Voi,. IV, 



men and telson are in most cases thickly strewn with small black chromatophores, 

 which give the animal a decidedly dusky appearance. The chromatophores are aggre- 

 gated on the longitudinal carinae and on the posterior margins of the abdominal and 

 last three thoracic somites. The telson is often very densely pigmented all over except 

 in the vicinity of the marginal denticles. On the uropods the endopod and basal seg- 

 ment of the exopod are suffused with black at their distal ends and the proximal part 

 of the ultimate exopodal segment is tinged with the same colour. 



In the Indian Museum are nineteen specimens registered as follows : — 



o3o ^~ 66 Off the S. Coast of Arabia; no fms., ' Investigator.' 10 5 1 , 8 9 , ] 73—84 mm. 



15 8' 30" N., 51 52' 15" E. TYPES. 



6 jf Persian Gulf. F. H. Townsend. 1 9 , 73 mm. 



30, Squilla supplex, Wood-Mason. 

 Plate VI, rig. 69. 

 1875. Squilla supplex, Wood-Mason, Proc. As. Soc. Bengal, p. 232, reprinted in Ann. Mag. Nat. 



Hist. (4), XVII, p. 263 (1876). 

 1880. Squilla supplex, Miers, Ann. Mag. Nat. Hist. (5), V, p. 20. 



1894. Squilla supplex, Bigelow, Proe. U. S. Nat. Mus., XVLI, p. 511. 



1895. Squilla supplex, Wood-Mason, Figs, and Desc. of nine Squillidae, p. 4, pi. ii, fig. 2; pi. iii, 



fig. 2. 



This and the two succeeding forms may easily be recognized from all other species 

 of the genus by the increased number of carinae (more than eight) on the abdominal 

 somites. 



In Squilla supplex the carapace and abdomen show no trace of punctuation. The 

 carapace, measured behind the antero-lateral angles, is about half its median length 

 excluding the rostrum. The median carina is sharp and distinct except for its anterior 

 bifurcation' 2 which is obsolete. The intermediate and lateral carinae are indistinct in 

 the small type specimen but quite clear in the larger examples. The lateral margins 

 are not angled in front of the posterior corners, but antero-laterally are produced as 

 sharp spines, which, however, fail to reach as far forwards as the level of „the rostral 

 base. The breadth of the rostrum is a little greater than its median length and its 

 upturned lateral margins ccnverge gradually to the broadly-rounded anterior margin. 

 Dorsally the rostrum is smooth except for an indistinct median carina in its anterior 

 half. 



The eyes are short. The breadth of the cornea is about equal to the total length 

 and the corneal and peduncular axes are set at right angles to one another. The an- 

 tennular peduncle is shorter than the carapace. There is a three-segmented mandi- 

 bular palp. 



The outer inferior margin of the merus of the raptorial claw is bluntly angled 

 distally and the carina on the dorsal aspect of the carpus is entire, but terminates 



1 Part of a haul of over 500 specimens. 



a In Wood-Mason's figure it is much too clearly shown. 



