1921] Schmitt: The Marine Decapod Crustacea of California 259 
Pinnixa faba (Dana) 
Plate 40, figures 1, 2, 3, and 4 
Pinnotheres faba Dana, Proc. Acad. Nat. Sci. Phila., 5, 253, 1851; Crust. 
U. S. Expl. Exped., 1, 381, 1852, pl. 24, fig. 4, 1855. 
Pinnixa faba Holmes, Occas. Papers Calif. Acad. Sci., 7, 93, 1900; Rath- 
bun, H. A. E., 10, 188, 1904; Weymouth, Stanford Univ. Publ., Univ. 
Ser., no. 4, 59, text fig. 7, 1910 (part: specimen from Monterey Bay) ; 
Rathbun, Bull. U. 8. Nat. Mus., 97, 142, text figs. 27, 88, pl. 31,-figs. 1-4, 
1918. 
Po) eS 
b 
Fig. 154.’ Pinnixa faba, X 6; a, right chela of g; b, left chela of 2 (after 
Rathbun). 
Characters.—Carapace about one and a half times as wide as long, oblong, 
strongly convex, both longitudinally and transversely, truncated at the sides. In 
some males the anterolateral angle is vertically compressed and correspondingly 
thin, forming a laterally projecting lobe; no transverse ridge behind the gastric 
area; anterolateral margins marked by a low ridge, which disappears near the 
orbits; orbits oval. Hands of chelipeds flattened, widest just behind the articu- 
lation of dactyl; more or less pubescent on inner side between the fingers; fingers 
of female not gaping; immovable finger of male horizontal. Merus of third 
pair of ambulatory legs of male more than twice as long as wide. 
Dimensions.—Type, female: length of carapace 11.7 mm., width 17 mm. 
Color.—Dark or light brown, or brownish red, with hand coarsely dotted with 
color (Dana). Specimens in formalin: General color of females orange rufous 
with patches of scarlet on the gastric regions. Eggs orange chrome. Male, 
orange rufous, or dirty greenish-white, with orange rufous spots on carapace and 
a few of the same on chelipeds and legs. One female from Taylor Bay, British 
Columbia, was entirely white in life (Rathbun). 
Type locality—Puget Sound. 
Distribution—From Prince of Wales Island, Alaska, to Humboldt Bay, Cali- 
fornia (Rathbun). San Pedro, California (Holmes). 
Remarks.—Commensal in bivalve mollusks: Schizothaerus, Saxidomus, Mya, 
Paphia (Rathbun); and cloaca of large holothurian, Molpadia (Holmes). Miss 
Rathbun, however, thinks Holmes’s specimen may have been P. barnharti. 
