6o 



TRUE CRABS OF MONTEREY BAY 



Cryptophrys concharum Rathbun. 



Cryptophrys concharum Rathbun, Proc. U. S. Nat. Mus., xvi, 250, 1893. — Holmes, 

 Occas. Papers Calif. Acad. Sci., vii, 96, 1900. — Rathbun, H. A. E., x, 188, 1904. 



"From Puget Sound to San Diego, Cal." (Rathbun). I have a single 

 somewhat damaged specimen which I would place here were it not for 

 the undoubted presence of three joints in the palp of the maxilliped. It 

 is possibly new but on account of its condition I am unwilling to describe 

 it. 



Genus OPISTHOPUS Rathbun. 



Opisthopus Rathbun, Proc. U. S. Nat. Mus., xvi, 251, 1893. (Type — Opisthopus 

 transversus Rathbun). 



Fig. 9. — Opisthopus transversus Rathbun. $ , x 6, Monterey Bay, Cal. 



