PYLOPAGURUS LONGIMANUS. 63 



The hand of the next pair of appendages is ahnost 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 segments, 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 one on the left side 

 is much larger than that on the right. The telson is imperfectly divided by 

 a transverse sutvire, 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 nun., 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 carcinoecia. 



Pylopagiinis longimanns is similar to P. tmr/idatus (Studer),* but may be 



* Eupaourus migulafus Studer, Crustaceen der Gazelle, p. 2G, Plate II. Fir. 13: Abhandl. Konisl Akad. 

 Wissenscb. zu Berlin, 1S82 ; Pi/lopagurus ungulatus A. M. Edw. et Bouv., Mem. Mus. Comp. Zool., Vol. 

 XIV., No, 3, p. 80, Plate VI. Fig. 15-18, 1893. 



