180 Records of the Indian Museum. [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 (fig. 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, strongly convex. This margin 
also appears to lack the usual fringe of setae which occurs in the 
other species. The antennary angle of the carapace is rectangular, 
but the infra-antennary, as in Bouvier’s Gennadas alicet, is entirely 
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 eyes 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 
dorsally , 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 evidently little more than twice as long as wide and 
the very broad apex of the lamella appears to have extended far 
beyond 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 Benthesicymus 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 Benthesicymus 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. 
