1916. | S. Kempe: Notes on Crustacea Decapoda, 403 
Hippolysmata ensirostris, Kemp. 
1914. Hippolysmata enstrostris, Kemp, Rec. Ind. Mus., X, p. 118, 
pl. vil, figs. 1-4. 
A number of very interesting larval and post-larval specimens 
belonging to this species have recently been found off the Orissa 
coast. ‘The post-larval specimens are about 14 to 16 mm. in length 
and in most of their characters agree closely with adults. The 
rostrum, however, is much shorter, usually not reaching the end 
of the antennal scale and the peraeopods, though well-formed, 
with perfect chelae, and with apparently the full number of sub- 
segments in the carpus of the second, possess rudimentary exopods 
on all pairs except the last. The apex of the telson is compara- 

Fic. 5.—Hippolysmata ensirostris, Kemp. 
Late larval stage. 
tively broad, with a pair of long spines that extend beyond the 
small median point by more than half their length. ‘These spines 
appear to dwindle slowly in the course of further development and, 
though not mentioned in my original description, traces of them 
may still be found in specimens 40 mm. in length. 
Judging by the number of teeth on the basal crest of the 
rostrum, these post-larval specimens belong to H. enstvostris rather 
than to its variety punctata. 
Other specimens, found with the above, almost certainly 
represent the same species in its last larval stage, but show re- 
markable differences in structure (text-fig. 5). The rostrum is 
short, dorsally convex and bears teeth only on its dorsal margin 
and that on the carapace, which is deeply grooved on either side 
