16 Crustacea and Echinodermata of the 



oregonia gracilis. Dana. 



Oregonia gracilis, Dana ; U. S. Exploring Expedition, Crust, i. 106, PI. III. f. 2. 



The Oregonice may be distinguished by the great length 

 of their legs, the penultimate joint of which is not expanded ; 

 and by the long, slender, post-orbital spine. The rostrum 

 is slender, and forked nearly from its base ; in this species 

 the horns are long, and diverge toward their extremities. 



Puget Sound, (Pickering.) 



Mus. Expl. Exped. 



oregonia hirta. Dana. 



Oregonia hirta, Dana ; U. S. Expl. Exped., Crust, i. 107, PI. III. f. 3. 



This is more hairy than the preceding species, and has a 

 proportionally longer rostrum. Both are inhabitants of 

 deep water. 



Puget Sound, (Pickering.) 



Mus. Expl. Exped. 



pugettia gracilis. Dana. 



Pugcttia gracilis, Dana ; U. S. Exploring Expedition, Crust, i. 117, PI. IV. f. 3. 



The genus Pugettia is characterized by the large post- 

 orbital expansions of the depressed, unarmed carapax. Ros- 

 trum bifurcate, horns diverging. The deep constriction 

 between the hepatic and branchial regions renders it easily 

 distinguishable from all other crabs of this coast, except 

 perhaps Hyas lyratus, which has a simply cleft rostrum. In 

 the present species the post-orbital expansions are trian- 

 gular. 



Puget Sound, (Expl. Exped.) 



Mus. Expl. Exped. 



