i 4 4 



Records of the Indian Museum. [Vol. XXIV 



igi.s 



Periclimenes (Periclimenes) indicus (Kemp). 



75, pi. xiii, fig - , u. 



Ui'ocaris iudica, Kemp, Mem. Ind. Mus. V, p. 

 texi-fi?. 26. 



A comparative statement of the principal differential charac- 

 ters of P. indicus and P. infraspinis will be found under the above 

 reference (p. 278). 



So far as is known at present P. indicus is restricted to the 

 coasts of the Indian Peninsula. It is known from the Chilka Lake 

 in Orissa, from Ennur backwater and the Adyar River near 

 Madras and from Pamban and Kilakarai at the upper end of the 

 Gulf of Manaar. The species is estuarine as well as marine and in 

 places like the Chilka L,ake, where there are great seasonal 

 changes in salinity, has been found in fresh water. 



Tkx t-l'k;. 13. — Periclimenes indicus (Kemp). 



a. Anterior part of carapace and rostrum. 



b. Dactylus of fifth peraeopod. 



I have no additional records of this species, but give further 

 figures of the rostrum and dactylus of the last leg for comparison 

 with P. obscurus. 



Periclimenes (Periclimenes) obscurus, sp. nov. 



The rostrum is longer in females than in males. In the former 

 sex (text-fig. 146) it extends beyond the end of the antennular 

 peduncle, usually reaching the end of the antennal scale, while 

 in the latter (text-fig. 14a) it reaches only to the middle or end 

 of the second antennular segment. The upper portion of the 

 blade is convex, but does not take the form of the strongly 

 arched lamella found in P. indicus. On the upper border there 

 are from 7 to 10 teeth, usually 8 or 9 ' ; the hindmost of these 

 is separated by a considerable interval from the next of the 

 series, but is always situated further forwards than in P. indicus. 

 The remaining dorsal teeth are more or less evenly spaced and 



1 Of thirty-three specimens five have 7 dorsal teeth, twelve have 8, twelve- 

 have y and four have i<». 



