PYLOPAGURUS LONGIMANUS. 63 
The hand of the next pair of appendages is almost perfectly chelate, and 
is furnished with but few hairs ; its rasp is restricted to the distal part of the 
claw, but is nevertheless broad and composed of many rows of scales. The 
hand of the last pair of thoracic appendages is cheliform, ornamented with a 
tuft of very long and curved hairs on the upper border; the proximal or 
hind border of the rasp is concave. 
The abdomen is longer than the carapace ; the integument is very thin 
and soft, barring the last two seements, whose dorsal walls are well calcified. 
Asymmetry is but little apparent except through the disparity of the ter- 
minal appendages, and the absence of false feet on the right side. False 
feet are found on the left side to the number of three (in the male). Each 
of them consists of a basal stem which carries two setiferous branches of very 
unequal size. The sixth somite is divided into two unequal parts by a trans- 
verse suture ; of the appendages borne by this somite the oné on the left side 
is much larger than that on the right. The telson is imperfectly divided by 
a transverse suture, and a notch in the posterior margin divides the hinder 
portion into two lobes which are not quite symmetrical. The posterior 
margin is armed with a few minute denticles. 
Traces of color are still perceptible in the alcoholic specimens, especially 
upon the legs, which are yellowish, variously banded and mottled with red. 
Length of carapace, 10 mm.; length of carapace in front of cervical 
groove, 5 mm.; length of eye-stalk, 4 mm.; length of right cheliped, 
34.5 mm. (merus, 8 mm., carpus, 11 mm., propodite, 14.8 x 8 mm., dactylus, 
10 mm.); length of left cheliped, 18 mm. (chela, 6 mm.), length of: first 
right ambulatory leg, 7 mm.; dactylus of first right ambulatory leg, 8.5 mm. 
In younger and smaller specimens the chelipeds are shorter in proportion 
to the length of the body and the major claw is shorter, broader, and more 
regularly oval in outline. A specimen whose carapace is 6.5 mm. long gives 
the following dimensions for the right cheliped: total length, 16.5 mm. ; 
merus, 4.5 mm.; carpus, 5.5 mm.; propodite, 7.5 mm.; dactylus, 4.5 mm. 
Station 3368. 66 fathoms. 5 males. 
One specimen is in a Gastropod shell thickly encrusted with Bryozoa, the 
others are without carcincecia. 
Pylopagurus longimanus is similar to P. ungulatus (Studer),* but may be 
* Dupagurus ungulatus Studer, Crustaceen der Gazelle, p. 26, Plate IT. Fig. 13: Abhandl, Konigl. Akad. 
Wissensch. zu Berlin, 1882; Pylopagurus ungulatus A. M. Edw. et Bouv., Mem. Mus, Comp. Zodl., Vol. 
XIV., No. 3, p. 80, Plate VI. Fig. 15-18, 1893. 
