1922.] 



S. Kemp: Notes on Crustacea Decapoda. 



175 



one another when the chela is shut ; they are without teeth on 

 their cutting edges and are nearly 1*5 times as long as the palm. 



The last three peraeopods are extremely slender. The third 

 pair (text-fig. 336) reaches beyond the apex of the scale by 

 two-thirds the length of the propodus, the fifth by about half the 

 length of the propodus. There are some setae at the distal ends 

 of the propodites, but no spinules on their posterior margins. 

 The dact3 T lus in each pair is very slender, simple, slightly curved 

 and almost half the length of the propodus. 



Text-tig. 33. — Periclimeues leptopns, sp. nov. 

 a. Second peraeopod. b. Third peraeopod. 



The sixth abdominal somite is about 15 times the length of 

 the fifth The anterior pair of dorsal spinules of the telson is 

 placed a little in front of the middle point. The intermediate 

 pair of apical spines is very long, about one-third the length of 

 the telson. The outer uropod is nearly three times as long as 

 wide. 



The largest specimen is an ovigerous female about 12^ mm. 

 in total length. 



P. leptopus is easily distinguished by the proportions of the 

 segments of the second peraeopods and by the comparatively 

 great length of the dactyli in the last three peraeopods. 



C. 35} 1. Port Blair, Andamans. 



S. Kemp, Feb. 



Three (two ovig\), 

 Types. 



