o2 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
Dimensions of the specimen under notice :— 
millim. 
Breadth of the cephalothorax (distance between 
the fourth or penultimate antero-lateral teeth) 112 
Length of the cephalothorax, ........2¢)).sm9ee 82 
Breadth of the front: 0.4 «:%.sne6 00 eee eee 4 
Actumnus nudus was discovered in 1867 at Pondicherry, but 
has not been recorded since, so far as I am aware. 
Milne-Edwards’s specimen had evidently lost the hairs with 
which the legs had been sparsely clothed. 
Genus Hetrrropanope, Stimpson. 
The name Heteropanope, established by Stimpson in 1858, 
being of older date than the name Pilumnopeus of A. Milne- 
Edwards, I propose to include under the former a small number 
of Crustaceans from the Indo-Pacific region, which were de- 
scribed by Stimpson as representatives of Heteropanope, together 
with a few species described by A. Milne-Edwards, Miers, and 
Haswell under the name of Pilumnopeus. I may, however, 
remark that Stimpson also referred to his genus Heteropanope 
those species which are regarded as representatives of the 
genus Lpixanthus. As regards the genus Pilumnopeus, two 
species have been described by the French carcinologist under 
that name, one of which, Pilwmnopeus maculatus, is a true 
Eurycarcinus; whereas the second, named Pilumnopeus cras- 
simanus, is probably identical with Ozius serratifrons, Kinahan, 
and also perhaps with Stimpson’s Heteropanope australiensis 
(Miers, Zoology of the Voyage of H.M.S. ‘ Alert,’ Crustacea, 
p- 228). Iam the more inclined to retain the genus Hetero- 
panope, because, when the genus Pilumnus is submitted to a 
thorough revision, it may be useful to refer to the former some 
species which still bear the name of Pilumnus. 
The glabrous or scarcely hairy cephalothorax of most species 
of Heteropanope is little convex (except that of H. serratifrons) 
and but little enlarged ; the lateral margins are armed with four or 
five more or less prominent teeth, which are never spiniform, and 
the front is more or less prominent. The external antenne 
resemble those of Pilumnus, the basal joint being small and not 
nearly reaching the front. The endostome is longitudinally 
ridged. The inferior margin of the orbits, which are transverse, 
