224 



University of California Publications in Zoology [Vol. 23 



Cancer antennarius Stimpson 



Plate 35, figure 3; plate 36, figure 8 



Cancer antennarius Stimpson, Proc. Calif. Acad. Sci., 1, 96, 1856; Jour. 

 Boston Soc. Nat. Hist., 6, 466, 1857; Eathbun, E., The Fisheries and 

 Fishery Industries of the U. S., sec. 1, p. 771, pi. 263, 1884; Holmes, 

 Oceas. Papers Calif. Acad. Sci., 7, 49, 1900; Eathbun, H. A. E., 10, 

 176, 1904; Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 47, 

 pi. 10, fig. 31, pi. 11, fig. 32, 1910. 



Fig. 137. Cancer antennarius, X about % (after E. Eathbun). 



Characters. — Carapace smooth, widest at eighth anterolateral tooth, eleventh 

 (really the second posterolateral) tooth distinct; fr onto -orbital width one-third 

 the width of the carapace; front not produced, the three median teeth separated 

 from the outermost pair, which is the largest, middle tooth smaller and rather 

 below the lateral ones. Merus of outer maxillipeds with distal margin nearly 

 transverse, angles rounded. Carpus of chelipeds with a single spine above, at 

 distal end; outer surface of hand eostate, costae well marked in the young, almost 

 obsolete in the adult; dark color on the fingers of the chelipeds, reaching more 

 than one-half the length of the outer margins. Under parts spotted or blotched 

 with reddish. Dactyls of ambulatory legs with eight longitudinal sulci, three 

 superior, three inferior, one anterior, and one posterior. 



Dimensions. — Types, male: length of carapace 61.7 mm., width 94 mm.; female: 

 length of carapace 54.1 mm., width 78.2 mm. The Bay specimens ranged from 

 8 to 57 mm. in width. 



Color. — Color of live specimens is fairly uniform and undergoes little change in 

 alcohol. The general shade is a dark red, usually more or less mottled with a 



