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. 



