224 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
granular and densely hairy above; the external margin of the 
cutting-edge presents a small transverse tooth at the base and 
appears, moreover, finely crenulate to near the tip. Near the 
latter, the inner margin of the cutting-edge is also somewhat 
crenulate. 
The smaller chelipede is similar to the larger, but the fingers 
are a little longer in proportion to the palm. The three following 
pairs of ambulatory legs successively decrease in length; the 
anterior pair are the longest, measuring about once and a fourth 
the breadth of the cephalothorax, and the posterior are the 
shortest. These ambulatory legs are very hairy along their 
margins, especially along the upper margin. The meropodites 
and carpopodites are unarmed; the propodites are a little shorter 
than the carpopodites, and measure about two-fifths of the length 
of the meropodites. Each propodite is armed on the middle of 
its under margin with a minute spinule and with three or four 
similar spinules at the distal end of this margin. The dacty- 
lopodites are very short; each terminates in a short, acute, 
arcuate claw, armed on its upper or external margin with a smaller 
accessory claw; the inner margin of the dactylopodite presents, 
moreover, one or two minute spinules. The dorsal accessory 
claw is directed close to and parallel with the larger terminal 
claw. 
The legs of the fifth pair have the usual form. 
This species differs from P. béwnguiculata, Dana, and P. obesula, 
White, by many characters, e. g. in its larger size, in the shape 
of its hands, the fingers of which are much shorter than the palm, 
in the structure of its ambulatory legs, in the animal being clothed _ 
with hairs, &c.; Polyonyx sinensis, Stimps., is doubtless another 
species. 
Dimensions of Porcellana (Polyonyx) Huphrosyne :— 
millim. 
Breadth of cephalothorax « «1.4% 5 Prweliy tee 13 
Lieneth of Same. 2 eg: 250 oe ie oe Oe 93 
Breadth of front :, ..:., .%oeuws 46elc eee 37 
Length of larger chelipede, ). ..2.s-407- 1a 30 
Length of wrist of same’, +....4- > «7 -ioi aerate 8 
Length of larger band’ ...!\25%0. 2 2.20 ee 14 
Height of palm thereof... \.j21 a: ~ oe ait 5 
Length of first pair of ambulatory legs .......... 153 
