52 Memoirs of the Indian Museum. [Vol. IV, 



the post- abdomen except the first and last. There are three prominent spots arranged 

 in the form of a triangle on each eyestalk. The peculiar arrangement of the chromato - 

 phores on either side of the telson is shown in fig. 41 ; it differs entirely from that 

 seen in any other species. 



The solitary specimen (^| 7 ) is a female 53 mm. in length. Unfortunately no 

 information concerning the locality at which it was taken is available, though there 

 can be little doubt that it was found within the area with which this paper is concerned. 



18, Squilla quinquedentata 1 , Brooks. 



1886. Squilla quinquedentata, Brooks, Voy. H.M.S. 'Challenger,' XVI, Stomatop., p. 26, pi. i, 



fig. 3 , pi. ii, fig. 6. 

 1894. Squilla quinquedentata , Bigelow, Proc. U.S. Nat. Mus,, XVII, p. 511. 



The surface of the carapace is smooth, highly polished and very finely punctate- 

 The abdomen also presents a polished appearance, but is rather more coarsely pitted. 



The breadth of the carapace, measured behind the antero-lateral angles, is about 

 half its length excluding the rostrum. The median carina is well-marked in front 

 of the cervical groove. Anterior to the small dorsal pit it is distinct for a distance equal 

 to the length of the rostrum, but of the anterior bifurcated portion only the faintest 

 traces exist. Behind the cervical groove the median carina is sharp ; it is bifurcated 

 for the greater part of its length and ends posteriorly in a prominent rounded tubercle. 

 The intermediate and lateral carinae are well developed. The antero-lateral angles are 

 produced to short spines that barely reach to the level of the rostral articulation ; the 

 posterior angles are sharply rounded. 



The rostrum is subquadrate, longer than wide, with its upturned lateral margins 

 only very slightly convergent. Dorsally it is finely punctate and bears a smooth, flat, 

 median tubercle. 



The eyes are not large ; the breadth of the cornea is about equal to the total length 

 and is not more than one-fifth the length of the carapace. The corneal and peduncular 

 axes are very slightly oblique and the stalk is somewhat dilated externally. The 

 anterior margin of the ophthalmic somite is evenly convex. The antennular peduncle 

 is shorter than the carapace excluding the rostrum. The mandibular palp consists 

 of three segments. 



The merus of the raptorial claw is armed with a stout spine at the end of its outer 

 inferior margin. The carpus is grooved and ridged externally and the dorsal carina 

 is entire and terminates abruptly before reaching the anterior edge. The propodus 

 is not broadened distally in the adult male. The dactylus is armed with five teeth 

 including the apical one ; the external margin is rather strongly sinuous and is very 

 obtusely angled near its basal articulation. 



Submedian and intermediate carinae are distinct on the last three thoracic somites. 

 The lateral margins of the fifth somite are bilobed ; the anterior lobe consists of a 

 sharp forwardly-directed spine, the posterior is shorter and subacute. There are no 

 inferior spines on this somite. The sixth and seventh somites are also bilobed later- 



See addendum, p. 195. 



