50 TRUE CRABS OF MONTEREY BAY 



aa. Dactyl of third pair of ambulatory legs distinctly curved. 



b. Carapace considerably more than twice as wide as long; third 

 ambulatory leg enormously developed, the distal end of the 

 merus not being reached by dactyl of fourth. P. longipes 

 bb. Carapace twice or less than twice as wide as long ; third ambula- 

 tory leg not enormously developed, the distal end of the 

 merus being much over-reached by dactyl of fourth. 



P. littoralis 



(Pinnixa occidentalis Rathbun.) 



Pinnixa occidentalis Rathbun, Proc. U. S. Nat. Mus., xvi, 248, 1893. Holmes, 

 Occas. Papers Calif. Acad. Sci., vii, 89, 1900. Rathbun, H. A. E., x, 187, 1904. 



Fig- 3- Pinnixa occidentalis Rathbun. $ , x 5, Monterey Bay, Cal. 



There is in the University collection a bottle containing several 

 specimens of this together with two females of the following species, 

 apparently from Monterey Bay, but as the southern limit of this species 

 as given by Holmes is Humboldt County, I feel some hesitation in adding 

 it to the present list. 



Pinnixa calif orniensis Rathbun. 



Pinnixa calif orniensis Rathbun, Proc. U. S. Nat. Mus., xvi, 249, 1893. Holmes, 

 Occas. Papers Calif. Acad. Sci., vii, 90, 1900. Rathbun, H. A. E., x, 187, 1904. 



