I 9 2I.] 



Fauna of the Chilka Lake : Amphipoda. 



553 



of the propod is irregu- 

 lar, the central portion 

 being produced into a 

 blunt triangular tooth; 

 the finger is much 

 longer and has a pro- 

 jection on its outer 

 margin near the base ; 

 the setae on the merus 

 are still numerous, but 

 there are comparative- 

 ly few on the three 

 terminal joints. 



In the female the 

 first gnathopod (fig. 

 nc) is of more normal - 

 shape and scarcely 

 subchelate, the carpus 

 is broader than the 

 propod but not pro- 

 duced into a distal 

 tooth, the propod is 

 oblong about as long 

 as the carpus ; the 

 four distal joints bear 

 numerous long plu- 

 mose setae as shown 

 in the figure. 



The second gnatho- 

 pod in both sexes (fig. 

 nd) is somewhat simi- 

 lar to the first gnatho- 

 pod of, the female but 

 more slender and has 

 the merus produced 

 distally into a lobe or 

 scoop, something like 

 that in Paracorophium 

 excavatum G. M. Thom- 

 son, but much shorter ; 

 the length of this pro- 

 jection varies accord- a 

 ing to the develop- &• 



Pig. ii. — Grandidierella gilesi. 

 First gnathopod of male, somewhat immature. c. First gnathopod of male. 

 First gnathopod of mature male. d. Second gnathopod of mak 



