1916.J vS. Kemp : Notes on Crustacea Decapoda. 369 



The outer maxillipedes are clothed with long setae and reach 

 beyond the end of the antennal scale by almost the entire length 

 of the ultimate segment. 



The first peraeopods (text-fig. 4c) are a little shorter than the 

 outer maxillipedes and are not provided with exopods. The spine 

 on the outer margin of the merus is terminal and on the anterior 

 margin between it and the articulation of the carpus there is another 

 smaller spine. The carpus is short ; the inner margin is lobed and 

 bears coarse setae, while on the outer margin are two spines. The 

 breadth of the hand, measured near its base, is about one third its 

 entire length. 



The second peraeopods (text-fig. 4^) reach to the carpus of the 

 first pair. The carpus is two thirds the length of the merus and is 

 as Ions: as the palm and half the length of the fingers. In the chela, 

 which as in the preceding species is weakly constructed and with- 

 out cutting margins or terminal claws, the palm is about one 

 seventh longer than the dactylus. The fixed finger is noticeably 

 shorter than the dactylus and both fingers bear long setae. 



The slender third peraeopods reach beyond the antennal scale 

 by about the length of the two ultimate segments. The merus is 

 a little shorter than the ischium and a little longer than the pro- 

 podus. The carpus is one and two thirds the length of the merus 

 and is one fifth longer than the propodus and dactylus combined. 

 The fourth and fifth legs are rather densely clothed with hairs. 

 The merus, carpus and propodus are subequal and the dactylus is 

 a little more than half their length. 



The abdominal somites are quite smooth and are covered with 

 a fine pubescence similar to that on the carapace ; the margins of 

 the pleura are rounded. The inner ramus of the last four pairs of 

 pleopods is comparatively well developed in the male and carries 

 an appendix interna ; in the female it is reduced and no trace of 

 this appendage is to be found. The outer uropod is shorter than 

 the inner and is nearly three times as long as broad. The telson 

 is one and a half times the length of the last abdominal somite; it 

 is provided with two pairs of dorso lateral spinules and its lower 

 margins are ciliated. The apex is similar to that of P. parvirostris. 



Pontophilus pilosus is sometimes conspicuously banded in life 

 with dark brown. In examples from very shallow water there is a 

 narrow transverse band at the posterior end of the carapace and 

 others, rather broader, on the second and fourth abdominal somites 

 and across the middle of the telson and uropods. Individuals 

 obtained at a depth of two fathoms were marbled with brown pig- 

 ment mixed with a certain amount of pure white, the carapace 

 being sometimes of a dull reddish-brown. In all the specimens 

 there was a dark spot at the distal end of the subchela. 



The specimens were obtained at the northern end of the Gulf 

 of Mannar. — 



-fo" Kilakarai, Ramnad S. Kemp. 2 juv., 3 (^, 4 ?, 



dist., S. India. S'5-I3 """''''• Type.s. 



