CALIFORNIA STALK-EYED CRUSTACEA. 49 



represented on the anterior portion by low crenulations 

 which become more acute behind. In the adult the 

 posterior tooth may curve forwards but not so sharply 

 as in antennarius. Secondary denticles are nearly 

 obsolete. The granules on the carapace are of unequal 

 size, being generally larger and sharper on the median 

 region. In the females the carapace is generally more 

 convex than in the males. 



Queen Charlotte Island (Smith), Vancouver Island 

 (Bate), Puget Sound (Dana), Oregon. Common on the 

 entire California coast to Lower California. 



Cancer antennarius St. 



Cancer antennarius STIMPSON, Proc. Gal. Acad. Sci., Vol. I, 1856, p. 88; 

 Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 462, PI. XVIII. LOCK- 

 INGTON, Proc. Gal. Acad. Sci., Vol. VII, 1877, p. 96. SMITH, Eep. 

 Prog. Geol. Sur. Canada, 1879, B, p. 207. RATHBUN R., The Fish- 

 eries of the U. S., Sec. 1, 1884, p. 771, PI. CCLXIIL MIEKS, Challenger 

 Reports, Vol. XVII, 1886. OBTMANN, Zool. Jahrb. Abth. f. Syst., Bd. 

 VII, 1894, p. 425. 



Platycarcinus recurvidens BATE, Proc. Zool. Soc. London, 1864; Ann. Nat. 

 Hist. (3), Vol. XV, p. 488; in Lord's Nat. in Vancouver's Island, Vol. 

 II, 1866. 



Carapace undulated, smooth, widest at the penultimate antero-lateral 

 tooth, the granulations on the surface minute and even. Front not pro- 

 duced, the three median teeth separated from the outermost pair which 

 is the largest. The middle tooth is smaller than those on either side and 

 situated a little below them. A tooth on the superior margin of the orbit 

 between the two fissures. The tooth on the basal antennal joint projects 

 further forward than the lateral tooth of the front and there is quite a 

 prominent tooth on the inferior orbital margin just external to it. The 

 postorbital is the smallest of the antero-lateral teeth but is relatively much 

 larger than in productus. The teeth of the autero-lateral margin are large 

 and have the tips sharp (except when worn) and curved forward; on the 

 margins of the teeth, especially the anterior margin, there are usually 

 small, sharp, secondary denticles. There are but nine large antero-lateral 

 teeth, the tenth being probably represented by a small projection behind 

 the last large tooth. Flagellum of the antennae usually long, generally 

 4 



