274 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
the carpopodite of the second legs have precisely the same length 
as in A. neptunus. The joints of the peduncle of the internal 
antenne perfectly agree with Dana’s figure of A. neptunus 
(pl. xxxv. fig. 5a), the second joint being distinctly shorter than the 
first, whereas in. the six specimens referred above to A. neptunus: 
the difference is much smaller. In one of our examples the ocular 
spines and the rostrum have the same length, extending, as in 
A. neptunus, to the middle of the first joint of the peduncle of the 
internal antenne; but in the two other specimens the rostrum 
projects a little more forwards than the ocular spines, but it does 
not reach the distal end of the first joint. 
I regard this form also as a variety of Alpheus minor, Say, 
because the foregoing species vary in some of their characters, as 
I have demonstrated above; and it is also possible that the two 
characters above mentioned may prove to be variable, when a suf- 
ficiently large seriesis examined. Alpheus tricuspidatus, Heller, 
from the Red Sea is probably identical with A. biwnguiculatus. 
Alpheus biunguiculatus was discovered by Stimpson at the 
Sandwich Islands amongst Madrepores. 
Genus Nica, Lisso. 
152. Nica MacroenatHa, Stimps. 
Nica macrognatha, Stimpson, Proc. Acad. Nat. Sci. Philad. 1860, p. 26. 
Two very young specimens were collected at Owen Island. 
Although they are in a very bad and mutilated condition, there 
can be little doubt that they belong to Stimpson’s species, 
which was discovered at Hongkong. The rostrum, which 
is a little shorter than the eyes, is rather lamellate and 
appears acute when seen from above. ‘The external maxilli- 
peds are wanting in both specimens. ‘The armature of the 
longitudinally sulcated terminal somite of the abdomen wholly 
agrees with the description quoted above. The didactyle ante- 
rior leg is a little shorter than the monodactyle, and its carpo- 
podite is about as long as the palm (not shorter than it), whereas 
the fingers are shorter than the palin. 
Genus Harpruitus, Dana. 
153. Harprirus Miersi, n. sp. (Pl. XVII. figs. 6-10.) 
Two adult specimens, a male and an ova-bearing female, were 
found at Elphinstone Island. 
