236 University of California Publications in Zoology [VoL 28 
Family PorTUNIDAE 
Carapace moderately transverse, usually widest at last anterolateral marginal 
tooth; front with or without median tooth. Antennules fold back transversely or 
obliquely. Third maxillipeds not overlapping endostome. Ambulatory legs flat- 
tened, and more or less distinctly adapted for swimming. 
Key TO THE CALIFORNIA GENERA OF THE PORTUNIDAE 
I. Abdomen of male | shaped. Merus of outer maxillipeds prominent, and 
curved outward at the antero-external angle. (Not known north of Point 
Loma. ) é 
Callinectes, p. 236. 
II. Abdomen of male triangular. Merus of outer maxillipeds not markedly prom- 
inent at antero-external angle, more or less obtuse. 
Portunus, p. 237. 
Genus Callinectes Stimpson 
Abdomen of male very narrow, | shaped; merus of outer maxillipeds strongly 
produced outwardly at antero-external angle. Otherwise very similar to Portunus. 
Callinectes bellicosus (Stimpson) 
Lupa bellicosa (Sloat MS.) Stimpson, Ann. Lye. Nat. Hist. N. Y., 7, 57, 
1859 (1862); Lockington, Proc. Calif. Acad. Sci., 7, 105, 1877. 
Callinectes bellicosus Rathbun, Proc. U. S. Nat. Mus., 18, 365, pls. 22, 24, 
fig. 10, pl. 25, fig. 8, pl. 26, fig. 8, 1895; H. A. E., 10, 180, 1904. 
a eee 
a b 
Fig. 140. Callinectes bellicosus, slightly enlarged; a, abdominal outline of J; 
b, frontal outline (after Rathbun). 
Characters.—Carapace minutely granulated; front with two slender, sharp 
teeth, widely separated, and between them two very faintly marked median teeth; 
inner supraorbital fissure open, often throughout its length; postorbital tooth long, 
exceeding preorbital. Carpus of chelipeds with two or three external ridges and 
a few pointed tubercles near the anterior end; hand with a strong spine above the 
upper hinge joint, at the proximal end of a tuberculated costa; ridge on the 
posterior upper edge ending distally in a spine; fingers obscurely if at all ridged 
on outer face. 
