284 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
margin, the third tooth exactly above it ; the rostrum is more or 
less curved upwards towards the apex. The specimen, in which 
one of the second legs has still been preserved, is 72 millim. long 
from the tip of the rostrum to the end of the terminal scale. The 
leg of the second pair is 51 millim. long; the arm (84 millim. 
long) projects almost as much forward as the external maxillipeds, 
thus a little more than the peduncle of the external antenne ; 
the carpopodite (18 millim. long) is about once and a half 
as long as the arm, and somewhat thickened towards its distal 
end; the hand (183 millim. long) is almost once and a half 
as long as the carpopodite, the palm (11 millim.) is a little 
shorter than the carpopodite, and the fingers measure nearly 
two thirds of the length of the palm. They meet together along 
their whole length; and both fingers are provided on their inner 
margins with athin acute edge; the mobile finger presents, more- 
over, two minute teeth at its base, and the other finger one, 
opposite those of the mobile finger. The whole leg is minutely 
scabrous and rough, being covered by small spinules. 
The legs of the first pair project with their hands beyond the 
antennal scales, the hands being half as long as the wrists. The 
legs of the third pair project as much forward as the rostrum ; 
and the other legs are scarcely shorter. 
The other specimens are about the same size; but this 
species, according to Dana, attains a length of 120 millim. 
P. equidens has hitherto been only recorded from Singapore, 
and is still a very insufficiently known form. The species from 
Mauritius, which Heller referred to P. equidens (Heller, Sitz- 
ungsber. kais. Akad. der Wiss. in Wien, Bd. xlv. p. 418, Taf. i. 
fig. 44) is certainly a different species, distinguished by the carpo- 
podite of the larger hand being shorter than the palm. P. Ide, 
Heller, may perhaps prove to be identical with Dana’s P. equidens. 
Family PEN mIpZ. 
Genus Penamus, Fubr. 
158. PENZUS SEMISULCATUS, de Haan. 
Penzus semisulcatus, de Haan, Fauna Japon., Crustacea, p. 191, 
tab. xlvi. fig. 1; Miers, “On the Peneide,’ Proc. Zool. Soc. London, 
1878, p. 299. 
