i8o Records of the Indian Museuin. [Vol. V, 



Although the two specimens, on which the following account 

 is based, are very macerated, all the appendages are represented 

 with the exception of the last three pairs of peraeopods. 



The rostral crest (lig. 4) is elevated well above the dorsal 

 carina of the carapace and differs from that of all other known 

 species of Gennadas in having the superior margin, between the 

 apex and the small dorsal tooth, strongl}^ convex. This margin 

 also appears to lack the usual fringe of setae which occurs in the 

 other species. The antennar}' angle of the carapace is rectangular, 

 but the infra-antennary, as in Bouvier's Gennadas alicei, is entirety 

 absent. The branchiostegal spine is prominent. The cervical and 

 post-cervical grooves are rather strongly marked. Dorsally they 

 are widely separate, the distance between them being at least one 

 half the distance from the post-cervical groove to the posterior 

 margin. The mid-dorsal carina extends the whole length of the 

 carapace but is blunt posteriorly. 



The e^^es are large and appear to have been deeply pigmented 

 in life ; the conical process on the dorsal surface of the stalk is quite 

 unusually small. 



The second joint of the antennular peduncle is, measured 

 dorsallv, fully as long as the ultimate segment and is articulated 

 to it by its entire margin and not merely by the inferior edge as in 

 other species of the genus. The dilated portion at the base of the 

 upper flagellum is as long as the two proximal joints of the ped- 

 uncle. The antennal scale is unfortunately incomplete in every 

 case. It was evident^ Httle more than twice as long as wide and 

 the very broad apex of the lamella appears to have extended far 

 bevond the spine which forms the termination of the convex outer 

 margin. 



The ultimate joint of the mandibular palp (fig. 5) is longer 

 than the greatest width of the basal joint. In the second maxilla 

 (fig. 6) the anterior lobe of the internal lacinia is not wider at the 

 truncate apex than at the base, and is not so broad as the adjacent 

 lobe of the external lacinia. The endopod has almost exactly the 

 same form as in Bcntlicsicymus and bears from ten to fourteen 

 curved spines on its external aspect near the apex. 



In the first maxillipede (fig. 7) the exopod is provided with a 

 terminal lash as in typical Bcnthcsicymus and the third joint of 

 the endopod is about twice the length of the second. The merus of 

 the second maxillipede (fig. 8) is twice as long as wide and its 

 anterior prolongation (the part which extends forward beyond the 

 insertion of the carpus) is less than one-fifth the entire length 

 of the segment. The dactylus is provided with a single apical 

 spine. 



In the first pair of peraeopods the carpus, which is about the 

 same length as the chela, is two-thirds the length of the merus. 

 In the second pair the carpus is as long as, or a little shorter than, 

 the merus, the chela is only a trifle more than half the length of 

 the carpus and the dactylus is about as long as the palm. 



