Pacific Shores of North America. 15 



rynchs of this coast by its long, bifid, pubescent rostrum, the 

 forks of which are nearly parallel. The carapax is without 

 pubescence, with a few distant tubercles and a sharp spine 

 on each side at the branchial region. The legs are long, 

 and, with the exception of the first pair, very slender. It is 

 about 1\ inches in length. 



Oregon, (Expl. Exped.) 



Mus. Expl. Exped. 



scyea acutifrons. Dana. 



Scyra acutifrons, Dana ; U. S. Exploring Expedition, Crust, i. 95 ; PI. II. f. 2. 



This little crab may be recogni ze d by its ovate spineless 

 carapax, the regions of which are strongly prominent ; and 

 by its short, bifid, lamellar rostrum. 



Puget Sound, (Pickering.) 



Mus. Expl. Exped. 



othonia picteti. De Saussure. 



Othonia Picteti, De Saussure ; Revue et Magasin de ZoOlogie, v. 357, PI. 



XIII. f. 2. 



Mazatlan, ( Verreaux.) 



Mus. Phil. Acad. 



Dr. Johnston used the name Othonia for a genus of An- 

 nelides in 1835, — prior to its application to the crustacean 

 group by Bell. But Johnston's genus seems to be the 

 same as Fabricia, Blainv. 1828. 



mithrax armatus. De Saussure. 



Mithrax armatus, De Saussure ; Rev. et Mag. ZoOl. v. 355, PI. XIII. f. 1. 



Mazatlan, (Verreaux.) 

 Mus. Phil. Acad. 



tJ 



