63 



Hemigrapsus oregonensis (Dana). 

 Plate XIV, fig. 43- 



Pseudograpsus oregonensis Dana, Proc. Acad. Nat. Sci. Phila., 248, 1851. 

 Brachynotus oregonensis Holmes, Occas. Papers Calif. Acad. Sci., vii, 82, 1900. 

 Hemigrapsus oregonensis Rathbun, H. A. E., x, 189, 1904, and synonymy. 



This species is scarce on the southern side of Monterey Bay seeming, 

 as noted by Holmes, to prefer mud flats, where, as in San Francisco 

 Bay, they exist in almost incredible numbers. It is considerably smaller 

 than nudus. 



Color in life a light grey marked with minute blackish or dark blue 

 spots which are more numerous in some regions than in others. Legs 

 lighter, marked with similar spots ; hands of chelipeds whitish, without 

 spots. 



Genus PLANES Bowdich. 



Planes Bowdich, Excursions in Madeira and Porto Santo, pp. xi and 15, pi. xii, 

 figs. 20, 2b, 1825. 



( Planes minutus ( Linnaeus ) . ) 

 Plate XIV, fig. 44. 



Cancer minutes Linnaeus, Syst. Nat. Edit., xii, 1048, 1766. 

 Nautilograpsus minutus Kingsley, Proc. Acad. Nat. Sci. Phila., 202, 1880. 

 Planes minutes Rathbun, H. A. E., x, 189, 1904. 



This widely distributed pelagic species has been reported from off the 

 coast of California, and though I know of no record from Monterey Bay, 

 it has been included for completeness. 



