170 BULLETIN OF THE 



Pylopagurus hirtimanus, sp. nov. 



This species closely resembles P. rosaceus A. M. Edw. et Bouv., 1 from the 

 West Indian seas. Compared with the type of P. rosaceus it presents the fol- 

 lowing differences. The eyestalks are a little slenderer, and together with the 

 ophthalmic scales are separated by a wide interval in which the antennules lie, 

 exposed from above. In P. rosaceus, on the contrary, the ophthalmic stalks and 

 scales are closely approximated, concealing the antennules beneath. The outer 

 face of the right chela is ornamented with conical tubercles, whose bases are 

 expanded into circular plates ; these plates are closely packed over the surface 

 of the chela, so that no interstices are left between them ; their borders are 

 cut into a large number of minute radiating processes ; on the basal half of 

 the propodus the tubercles give rise to long setae, which render that part of 

 the claw conspicuously hirsute, in contrast with the distal part which is naked; 

 furthermore, on the distal half of the propodus, especially on the concave sur- 

 face of the immovable finger, the tubercular processes tend to become obsolete, 

 leaving only the basal circular radiate plate ; the bases of the conical teeth 

 along the outer margin of the hand and the movable finger are expanded at 

 the base into flattened roundish surfaces with radiate margins ; these surfaces 

 form a conspicuous outer border to the hand ; the inner face of the hand is 

 tuberculated. In P. rosaceus the tubercles of the outer face of the chela are 

 encircled by rounded granules much less numerous than the radiating points 

 in P '. hirtimanus ; the tubercles are so loosely arranged that numerous inter- 

 stices are apparent between them ; the hairs on the basal half of the hand are 

 not so well developed as in the Pacific species ; the whole outer face of the 

 immovable finger is strongly tuberculated, the teeth of the lower margin are 

 not expanded into conspicuous plates, and the inner face of the chela is nearly 

 smooth. The carpus in P. hirtimanus is armed with larger spines on the 

 internal margin, is more hairy, and more coarsely granulated on its inner, 

 inferior, and outer surfaces than it is in P. rosaceus. The left chela is com- 

 paratively smaller than in P. rosaceus, is more strongly toothed along the 

 internal margin of the propodus and dactylus, and exhibits, besides, most of 

 the above specified peculiarities of the right claw. The primary branch of the 

 unpaired abdominal appendages is shorter and broader than in P. rosaceus. The 

 rasp on the propodus of the fourth pair of legs is uniserial, as in P. rosaceus. 



Length of carapace of largest male, 12 mm. ; length of carapace in front of 

 cervical groove, 7 mm. ; breadth across the branchial regions, 9.5 mm. ; length 

 of large claw, 11 mm. ; breadth of large claw, 7 mm. 



Station 3367. 100 fathoms. 2 males, 1 female. 

 " 3368. 66 " 5 males, 5 females. 



A good deal of the color is still preserved in alcohol. The lower surface of 

 the eyestalk is quite a deep red, while the upper surface is a pale yellow. The 



1 Mem. Mus. Conip Zool., XIV. No. 3, p. 97, Plate VII. Figs. 10-17, 1893. 



