1895.] 
A. Alcock —Carcinological Fauna of India. 
187 
trum simple, shaped like the beak of a bird. Eyes retractile against 
the sides of the carapace : a small pre* ocular and post-ocular spine, but 
no definite orbit. 
Basal antennal joint slender throughout: the antennae visible, 
dorsally, from the base of the second joint. 
Merus of the external maxillipeds produced antero-externally to 
form a foliaceous lobe which covers the greatly produced efferent 
branchial orifice. 
Abdomen in the male seven-jointed : in the female the fourth, fifth 
and sixth segments, though distinctly recognizable, are firmly fused 
together. 
Chelipeds in both sexes slender. Legs long and slender. 
Only eight branchiae on either side. 
Encejohaloides armstrongi, Wood-Mason. 
Encephaloides armstrongi , Wood-Mason, Ann. Mag. Nat. Hist., March, 1891 
p. 259. 
Carapace heartshaped: its greatest breadth is equal to its length 
with the rostrum: its surface in the adult is nodular or pustular, in the 
young coarsely spiny. The gastric and hepatic regions are well-defined ; 
but the cardiac and intestinal regions are entirely concealed by the 
branchial regions, which rise up like a pair of mammae, and meet, but 
without any fusion of walls, down the middle line. 
The rostrum, which is shaped exactly like the beak of a bird, is 
about one-fourth the length of the carapace proper, and has a finely 
serrated edge. 
In the male the abdomen is distinctly seven-jointed ; but in the 
female the fourth, fifth and sixth segments are immovably sutured 
together. 
The eyes which are small, slender, and unpigmented, are retractile 
against the side of the carapace : there is a very narrow supra-orbital 
eave ending anteriorly in a minute tooth, and there is a small post-ocular 
spinule. 
On the dorsal aspect the antennae are plainly visible on either side 
of the rostrum, from the base of the 2nd joint of the peduncle : the 
flagella, which are of hairlike tenuity, hardly surpass the tip of the 
rostrum. 
Owing to the prolongation of the efferent branchial canal, the front 
edge of the buccal frame is Y-shaped, and the merus of the external 
maxillipeds ear-shaped. 
J. ii. 24 
