Notes on North American Crustacea. 87 



acuminated. Eyes slender, but mucli shorter than the width of the 

 front. Ophthalmic scales with an elongated apex, denticulated on both 

 margins. Acicle falling short of the extremity of the eye by one-sixth 

 of the length of the eye ; — it is hairy and spinose on both sides. Che- 

 lipeds equal. Terminal joint of abdomen unsymmetrical, with the left 

 terminal lobe much more produced than the right. The callosities of 

 the inferior surface of the thoracic members are numerous, large, black, 

 and well defined. 



Inhabits the western coast from Puget Sound to Monterey, 

 Cal. 



Pa^uristes depressus, nov. sp. 



Carapax flattened, naked; posterior portion much expanded ; sides of 

 anterior portion short, the transverse suture reaching far forward late- 

 rally ; surface rugulosc ; lateral sinuses spinulose. Anterior cardiac 

 lobe narrow-halberd-shaped, somewhat widening toward its blunt 

 posterior extremity. Rostrum elongated, reaching nearly to the mid- 

 dle of the ophthalmic scales, with its lip imbedded in the rounded tuber- 

 cle of the ophthalmic ring, which is exposed in this species. Eyes very 

 large, much over-reaching the tip of the peduncle of the very slender 

 antennulae. Ophthalmic scales with bidentate tip, — margins of apex 

 entire. Antennae short ; terminal joint of peduncle and flagellum very 

 slender, almost naked; acicle slender, spinous and hairy. Chelipeds 

 equal, broad, and depressed, almost naked ; meros scabrous above ; car- 

 pus minutely spinulose, and armed with four spines on the inner edge ; 

 hand uniformly minutely granulated, with five tubercles on the inner 

 edge of palm ; fingers with sharp, cutting inner edges ; tips not spini- 

 form ; immovable finger concave below ; dactylus near three times as 

 long as the inner edge of the palm. Ambulatory feet above scabrous, 

 spinulose and setose ; dactyli with a dense series of longer setae along 

 the superior and inferior edges. The inner side of the penult and ter- 

 minal joints in the left second foot is concave. The following are the 

 measurements of a female specimen : — general length, 3 inches ; length 

 of carapax, 0'77 ; breadth of front, 0'40 ; length of eye, 0-41 ; length of 

 chelipeds, 1*05 inch. 



