PYLOPAGURUS HIRTIMANUS. 65 



Length, about 12 mm. ; length of carapace, 4.5 mm. 



Station 3397. 85 fathoms. 1 male. 



There are three simple, mipaired abdominal appendages on the left side, 

 in the type specimen. The vasa deferentia are extruded from the base of 

 the fifth legs on each side. They appear as slender threads, the one on the 

 right side much longer than its fellow, and twisted (see Plate XII. Fig. 2'). 



The type specimen inhabited a Nassa shell whose orifice was built out 

 and enlarged by an encrusting, branching Bryozoon. 



Pylopagurus hirtimanus Fax. 



Plate XIII., Fig. 1, 1\ 



Bull. Mus. Comp. Zobl., XXIV. 170, 1S93. 



This species closely resembles P. rosaeeus A. M. Edw. et Bouv.,* from the 

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

 lowing differences : the eye-stalks are a little slenderer, and together with 

 the ophthalmic scales are separated by a wide interval, in which the anten- 

 nules lie, exposed from above. In P. rosaeeus, on the contrary, the ophthal- 

 mic 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 radiat- 

 ing proce.sses ; on the basal half of the propodite the tubercles give rise to 

 long setae which render that part of the claw conspicuously hirsute, in con- 

 trast with the distal part which is naked ; furthermore, on the distal half of 

 the propodite, especially on the concave surface of the immovable finger, the 

 tubercular processes tend to become obsolete, leaving only the basal circular 

 radiate plates ; the bases of the conical teeth along the outer margin of 

 the hand and movable finger are expanded 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. rosaeeus 

 tlie tubercles of the outer face of the chela are encircled by rounded gran- 

 ules much less numerous than the radiating points in P. hirtimanus ; the 

 tubercles; are so loosely arranged that numerous interstices are apparent 

 between them ; the hairs on the basal half of the hand are not so well 



' Mem. Mus. Comp. Zoul., Vol. XIV., No. 3, ].. 97, Plate VII. Fig. 10-17, 1S03. 

 9 



