274 DB. J. Q. DE MAN ON THE PODOPHTHALMOUS 



the carpopodite of the second legs have precisely the same length 

 as in A. nepfunus. The joints of the peduncle of the internal 

 antennae perfectly agree with Dana's figure o£ A. neptunus 

 (pi. XXXV. fig. 5«), the second joint being distinctly shorter than the 

 first, whereas in the six specimens referred above to A. neptunus 

 the diff"erence 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 antennae; 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 series is examined. Alpheus tricuspidatus. Heller, 

 from the Eed Sea is probably identical with A. liunguiculatus. 



Alplieus hkinguiculatus was discovered by Stimpson at the 

 Sandwich Islands amongst Madrepores. 



Genus Nica, Risso. 



152. NiCA MACEOGNATHA, 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 palm. 



Genus Haepilius, Dana. 



153. Haepiltfs Mieesi, n. sp. (PI. XVII. figs. 6-10.) 

 Two adult specimens, a male and an ova-bearing female, were 

 found at EljDhinstone Island. 



