204 Records of the Indian Museum. [Voi,. XXIV, 



with a series of 4 to 8 small teeth, very irregular in their size and 

 disposition. 



In a small male the carpus is only about 6 times as long as its 

 distal breadth, while the chela is 17 times its length. The palm 

 is rather more swollen than in large males, about 4*5 times as long 

 as broad. 



The female differs conspicuously from that of P. agag in that 

 the chela is always definitely longer than the carpus. In an 

 ovigerous specimen (text-fig. 530) the carpus is 7-5 times as long as 

 its distal breadth and 1*25 times as long as the merus. The chela 

 is 14 times as long as the carpus, with palm 16 times as long as 

 the fingers. 



The last three pairs of peraeopods are slender ; the fifth reach 

 to or a little beyond the end of the antennal scale. In the third 

 pair (text-fig. 53/) the merus is from 11*5 to 12-5 times as long as 

 wide. The propodite bears conspicuous spinules on its posterior 

 border and is from 3*5 to 4*0 times as long as the dactylus. The 

 dactylus is slender and curved, with a few setae in the middle of 

 its anterior margin, and is from 5 to 6 times as long as its basal 

 breadth. 



The sixth abdominal somite is rather less than 15 times the 

 length of the fifth. The telson resembles that of P. agag. 



The largest specimen is a male, about 17*5 mm. in length. 



I have no notes on the colouration of living specimens as the 

 differences between this and other closely related forms were not 

 noticed in the field. In specimens, however, which have only 

 been a few months in alcohol *a bright red spot is to be seen at the 

 end of the carpus of the second leg and a narrow red band across 

 the fingers of the same appendage. This colouration is not found 

 in any of the allied species. 



The principal differences between P. proximus and P. agag 

 may be summarized thus : — 



P. agag, sp. nov. 



Rostrum usually with 6 or 9 dorsal teeth. 

 Carpus of rirst peraeopods in females 



and young males i " 75 times, in adult 



males twice the length of chela. 

 Chela of second peraeopods in males 



11 to 1 "25 times length of carpus. 

 Chela of second peraeopods in females 



equal to or a little shorter than carpus 



P. proximus, sp. nov. 



Rostrum with (> or 7 dorsal teeth. 

 Carpus of first peraeopods less than 1*5 

 times length of chela. 



Chela of second peraeopods in males 



from 1 "4 to 1*7 times length of carpus. 

 Chela ol second peraeopods in females 



conspicuously longer than carpus. 



C 377-9/1. Port Blair, Andamans. S. Kemp, March, Twenty-two, in- 

 4-8 fms. 1915 ; Feb., March, eluding Types.' 



1 92 1. 



The specimens were found in Ross Channel in company with 

 P. agag and P. andamanensis. 



Periclimenes (Ancylocaris) andamanensis, sp. nov. 

 This species differs conspicuously from the two preceding in 

 the presence of a conspicuous distal spine on the inner side of the 

 carpus of the second peraeopods. 



