286 



Memoirs of the Indian Museum. 



[Vol. V, 



three and a quarter times as long as wide and the outer margin is straight terminat- 

 ing in a spine which reaches ahnost to the apex of the lamella. 



The mouth parts are illustrated in text-figs. 2ga-f. In the mandible the incisor 

 process is comparatively narrow and terminates in four or five teeth. The palp is 

 two-segmented, the basal segment being broadly expanded distally. The outermost 

 of the three portions that compose the first maxilla is bifid at the extremity, each 

 part bearing a single long seta. 



The first and second maxillipedes (text-figs. 2gd, e) are provided with large epi- 

 pods; that of the former appendage is bilobed. The third maxillipedes reach beyond 



Fig. 2<^.—0gy rides striaticaiida, sp. nov. 



a. Mandible. 



b. First maxilla. 



c. Second maxilla. 



d. First maxillipede. 



e. Second maxillipede. 

 /. Third maxillipede. 



the end of the eyes by the length of the ultintate segment, which is invariably flexed 

 upwards ; the exopod reaches nearly to the end of the antepenultimate segment. 

 The long plumose setae which clothe the limb are specially numerous on the ultimate 

 segment, which is rather less than half the length of the penultimate. It will be 

 noticed that the latter segment is much longer proportionatel)^ than in any other 

 genus of the family. 



The first peraeopods (text-fig. 30^) reach about to the end of the basal segment 

 of the antennular peduncle. The ischium is swollen and, as in 0. sibogae, is notched 

 inferiorly at the base. The proportional lengths of the i.schium, merus, carpus and 

 chela are as 10, 18, 19 and 14^. The fingers are rather less than twice the length of 



