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



19. Squilla gonypetes, Wood-Mason, MS. 

 Plate IV, figs. 42 — 44. 



1893. Squilla a finis, Pocock, Ann. Mag. Nat. Hist. (6), XI, p. 474 (partim). 

 1908. Squilla gonypetes, Lloyd, Rec. Ind. Mus., II, p. 33 (sine desc). 

 191 1. Squilla gonypetes, Kemp, Rec. Ind. Mus., VI, p. 96. 



This species is very closely allied to 5. quinquedentata but may be distinguished 

 by the following characters : — 



1. The rostrum is distinctly longer and its upturned lateral margins are rather 



more strongly convergent. 



2. The eyes are larger, the breadth of the cornea is about one quarter the length 



of the carapace and the corneal and peduncular axes are strongly oblique 

 (fig. 42). 



3. The antennular peduncle is a little longer than the carapace excluding the 



rostrum. 



4. The outer inferior margin of the merus of the raptorial claw is not produced 



as a spine ; the external margin of the dactylus shows only the very feeblest 

 traces of sinuation (fig. 43). 



5 . The lateral lobes of the sixth thoracic somite are about equal in length ; the 



anterior one is apically truncate and is not very much narrower than the 

 posterior which terminates acutely. Both lobes of the seventh somite are 

 acute, the anterior being more than half the length of the posterior (fig. 42). 



6. There are more spines on the abdominal somites. The following carinae 



end in spines : — 



Carinae. Abdominal somites. 



Submedian . . . . . . 5,6. 



Intermediate .. .. .. 3» 4> 5> D - 



Lateral . . .. * .. .. 2, 3, 4, 5, 6. 



Marginal . . . . . . 1, 2, 3, 4, 5. 



In respect of the punctuation and carination of the carapace and abdomen and 

 in the number of teeth on the raptorial dactylus, this species bears the closest resem- 

 blance to 5. quinquedentata and, like it, possesses a three-segmented mandibular palp. 



The telson (fig. 44) also is closely similar, but the marginal teeth are longer and 

 the outermost submedian denticle is often distinctly larger than any of the rest. The 

 lobe on the outer aspect of the longer spine of the uropodal process is rather unusually 

 prominent. There are three or four submedian denticles, six or seven intermediate 

 and one lateral. 



Though so nearly allied to S. quinquedentata, there is, I believe, no doubt that 5. 

 gonypetes is a distinct species. The greater obliquity of the corneal portion of the eyes 

 and the different form of the lobes on the margins of the thoracic somites are charac- 

 ters which preclude the suggestion that the specimens are merely young examples of 

 the form described by Brooks. 1 



1 Among the species belonging to the S. oraloria group it is noticeable that in very young specimens 



