526 



Memoirs of the Indian Museum. 



[Vol.. V, 



Peraeopods i and 2 as in /. aequicornis, slender, with long slender dactyls. 

 Peraeopods 3 to 5 increasing in length posteriorly, basal joint not greatly 

 expanded, its hind margin straight and sharply serrate. 



Third uropods (fig. ig) with the inner branch much larger and broader than the 



Fig. 1. — Idnnella chilkensis sp nov. 



a. Antennae of male. e. First gnathopod of female. 



b. Upper antenna of female. /. Second gnathopod of female. 



c. Lower antenna of female. g. Third uropod of female. 



d. First gnathopod of male. h. Telson of female. 



outer, outer with tufts of setules on both margins, inner one with fewer setules 

 and these confined to the outer margin and apex. 



Telson cleft to the base, each lobe narrow with outer angle strongly produced 

 into a sharp tooth, two stout setules arising from the concave extremity. 



Female, similar to the male except in the antenna? and gnathopods. 



