50 CALIFORNIA ACADEMY OP SCIENCES. 



exceeding the width of the front. Distal margin of the merus of the max- 

 illipeds nearly transverse and gently convex; inner margin notched. Chel- 

 ipeds stout; carpus with a stout tooth at the antero-internal angle and a 

 smaller tooth behind the superior hinge joint; the external surface is 

 smooth in old specimens but roughened, granulated and pubescent in 

 younger ones. The hand is longitudinally costate on the external surface 

 in young specimens but the costse disappear with age; the fingers are 

 smooth and tipped with black. Ambulatory legs very hairy or nearly 

 naked; the dactyls pubescent and a little stouter than in productus. 



Length of carapace, male 76 mm. 



Breadth of carapace, male 113.5 mm. 



Length of carapace, female 73 mm. 



Breadth of carapace, female 107 mm. 



The young of this species are relatively much less 

 wide than the adults and have the carapace and append- 

 ages thickly covered with hair. The hair on the upper 

 surface disappears with age and in old specimens the 

 appendages may become nearly naked. The postorbital 

 tooth in young specimens is fully as large as those be- 

 hind it. This is a well marked species and may easily 

 be distinguished from the other species on our coast by 

 the sharply recurved antero-lateral teeth. 



Queen Charlotte Island (Smith), Vancouver Island, 

 Oregon, northern to Lower California! Common. 



Cancer magister Dana. 



Cancer irroratus Randall, Journ. Acad. Nat. Sci. Phila., Vol. VIII, 1839, 



p. 116. 

 Cancer magister Dana, Proc. Acad. Nat. Sci. Phila., Vol. VI, 1852, p. 7p; Z) i 



Crust. U. S. Expl. Expd., Part I, 1852, p. 151, PL VII, fig. 1. Stimp- 



SON, Proc. Cal. Acad. Sci., Vol. I, 1856, p. 88; Journ. Bost. Soc. Nat. 



Hist., Vol. VI, 1857, p. 4.58. Cooper, Rep. Expl. Sur. Pac. Ocean, 



Vol. XII, 1860, p. 387. Lockington, Proc. Cal. Acad. Sci., Vol. VII, 



1877, p. 94. Smith, Rep. Prog. Geol. Sur. Canada, 1878-9, B., p. 206. 



Rathbun R., The Fisheries of the U. S., Sec. 1, 1884, p. 770, PI. 



CCLXI. 

 Metacarcinus magister A. Milne-Edwards, Ann. Sci. Nat. (4), T. XVIII, 



1862, p. 33, and (5), T. I, 1864, p. 67; Nouv. Archiv. Mus. Hist. Nat. 



Paris, T.I, 1865, p. 202, PL XIX, fig. 1. Ortmann, Zool. Jahrb. Abth. 



f. Syst., Bd. VII. 1894, p. 424. 



