THE CANCROID CRABS OF AMERICA 211 



Diagnosis. — Carapace widest at eighth antero-lateral tooth; two 

 postero-lateral teeth. Under parts spotted or blotched with reddish. 

 A single tooth or spine on wrist. 



Description. — Marginal teeth thick, high in the middle, deeply 

 separated, edges finely spinulous. The three frontal teeth between 

 the antennae are narrow, the median smallest and considerably lower 

 than the next pair. Between the large inner and outer orbital 

 teeth there is a smaller but prominent narrow tooth. Nine antero- 

 lateral teeth more or less acute and curving forward. Postero-lateral 

 teeth two, the first short but deeply marked, the second slightly 

 indicated. Dorsal surface very uneven, lumpy, granulation fine, 

 uniform; surface typically devoid of hair except in the very young. 

 Antennae unusually stout and long. Lower orbital margin cut into 

 two teeth between the outer and the antennal tooth. Chelipeds 

 heavy, nearly smooth; merus with a short distal and subdistal spine- 

 tipped tooth; inner tooth of carpus sharp, a conical tubercle near the 

 distal articulation; outer-upper surface of palm obscurely costate. 

 Legs rough and hairy; dactyli with five longitudinal rows of bristles. 



Variable as to hairiness, roughness of the hand, size of granules, 

 and thickness and sharpness of teeth. 



Color. — Fairly uniform, dark red usually more or less mottled with 

 a lighter, more yellowish tinge; under parts yellowish white spotted 

 with red. Dark color of fingers extends more than half length of 

 outer margins. 



Measurements. — Male (15445), length of carapace 78, width of 

 same 118, fron to-orbital width 30.3, wddth of front between antennae 

 12, width between tips of inner orbital teeth 20 mm. 



Range. — From Tomales Bay, California, to west coast of Lower 

 California, Mexico, as far south as San Geronimo Island, Magdalena 

 Bay (Lockington). 



Material examined. — See table, pages 212-213. 



CANCER BRANNERI Rathbun 



Plate 93, Figure 1 



Cancer gibbosulus Rathbun, Proc. U. S. Nat. Mas., vol. 21, 1898, p. 518 (part; 



not Corystes (Trichocera) gibbosula de Haan); Harriman Alaska Exped., vol. 



10, 1904, p. 176 (part).— Weymouth, Stanford Univ. Publ., Univ. Ser. No. 



4, 1910, p. 43, pi. 10, fig. 29 (not all synonymy). — Schmitt, Univ. Calif. 



Publ. Zool., vol. 23, 1921, p. 226, pi. 36, fig. 7 (not all synonymy or localities). 

 Cancer branneri Rathbun, Bull. 138, U. S. Nat. Mus., 1926, p. 63, pi. 16, fig. 4 



(type-locality, San Francisco; type. Cat. No. 3092, U.S.N.M.). 



Diagnosis. — First postero-lateral projection spiniform not project- 

 ing sideways beyond the carapace margin and followed by a minor 

 tooth. Carapace strongly areolate. Dactyl of cheliped spiny. 



D'escri'ption. — Carapace markedly areolate, sparsely pubescent, 

 hairs rather coarse and harsh, granules scabrous, somewhat scattered; 



