1922.] 



S. Kemp : Notes on Crustacea Decafioda. 



239 



The fingers are armed in the 

 proximal three quarters of 

 their length with from 3 to 

 7 teeth, very irregular in 

 their size and distribution. 

 The palm is less than twice 

 the length of the fingers 



(vii) In the third pair of 

 peraeopods the merus is 

 about 3*5 times as long as 

 wide. The propodus is as 

 broad as the merus and is 

 about 4"5 times as long as 

 wide ; at the distal end it is 

 very little broader than the 

 dactylus-. 



(viii) The pleura of the 

 fourth and fifth abdominal 

 somites are not acutely 

 pointed infero-posteriorly. 



(ix) The anterior of the 

 two pairs of dorsal spines on 

 the telson is placed behind 

 the middle of its length. 

 The posterior pair is midway 

 between the anterior pair and the apex. 



The largest specimen examined is a female about 18 mm. in 

 length. 



The telson of one of the specimens is abnormal, bearing 5 

 teeth on one of the lateral margins and 3 on the other. 

 C 412-3/1. Pamban and Kilakarai, S. Kemp, Feb., Four. 



Gulf of Manaar. . '9'3- 



The specimens were all obtained on madrepore coral. Those 

 examined by Nobili were found to the north-east of Arzana I. in 

 the Persian Gulf, " parmi les polypiers." Tattersall's specimens 

 are from a coral reef at Khor Dongonab in the Red Sea and those 

 recorded by Balss are from the Gulf of Suez, the Red Sea and the 

 vS. Coast of Arabia. 



1'f.xt-fig. 75. — Hnrpiltus gerlachei Nobili. 



a. Second peraeopod. 



b. Fingers of second peraeopod. 



Genus Pontoniopsis Borradaile. 



1915. Pontoniopsis, Borradaile, Ann. Mag. Nat. Hist. (8) XV, p. 207. 



1917. Pontoniopsis, Borradaile, Trans. Linn. Soc. (2) Zoo!. XVII, p. 

 377- 

 This genus, of which I have seen no specimens, was erected 

 by Borradaile for a single species, P. comanthi, found on crinoids 

 in the Torres Straits. It appears to be very closely related to 

 Periclimenes and Harpilius, but differs in its depressed and tooth- 

 less rostrum, which is lanceolate in dorsal view. Supra-orbital 

 and hepatic spines are wanting and the dactyli of the last three 

 legs are simple. 



