PYLOPAGURUS HIRTIMANUS. 65 
Length, about 12 mm.; length of carapace, 4.5 mm. 
Station 3397. 85 fathoms. 1 male, 
There are three simple, unpaired 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 XI. 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 XAT, Higa Te 
Bull. Mus. Comp. Zo6l., XXIV. 170, 1893. 
This species closely resembles P. rosaceus A. M. Edw. et Bouv.,* from the 
West Indian seas. Compared with the type of P. rosaceus 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. rosaceus, 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 processes ; on the basal half of the propodite the tubercles give rise to 
long sete 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. rosaceus 
the tubercles of the outer face of the chela are encircled by rounded gran- 
ules much less numerous than the radiating points in P. dirtimanus ; 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. Zodl., Vol. XIV., No. 3, p. 97, Plate VII. Fig. 10-17, 1893. 
9 
