1921] Schmitt: The Marine Decapod Crustacea of California 215 
much larger. In the female the tubercles on the carapace are smoother; those 
on the gastric region being small or obsolescent (Holmes). Regarding spine-like 
processes on basal antennal joint of figure given above and mentioned in the 
description given by Holmes, in his paper cited in synonymy above, Weymouth 
says, ‘‘The anterior external angle of the basal antennal joint is somewhat pro- 
duced but seems hardly to form a spine as stated by Holmes. The ‘two spines 
or teeth on the outer margin’ behind this are seldom prominent, the anterior being 
a little more than an undulation of the margin.’’ ‘‘Like most of the spider crabs 
this species is generally so overgrown with sponges and other forms as to conceal 
the color.’’ 
Genus Herbstia Milne Edwards 
Carapace broadly triangular, subpyriform or ovate, tuberculated or spinose. 
Rostrum short, composed of two short flattened, acute horns, somewhat dilated 
at the base. Basal antennal joint narrowing distally, outer margin not produced, 
spiny, distal portion not entirely covered by the rostrum. Merus of ambulatory 
legs spinose. With or without preocular spines; postocular present; deeply cupped 
on anterior face and without hairs; orbits shallow. 
Herbstia parvifrons Randall 
Herbstia parvifrons Randall, Jour. Acad. Nat. Sci. Phila., 7, 170, 1839; 
Holmes, Occas. Papers Calif. Acad. Sci., 7, 38, 1900. 
Herbstia (Herbstiella) camptacantha A. Milne Edwards, Crust. Rég. Mex., 
78, pl. 18, fig. 3, 1879; Holmes, Occas. Papers Calif. Acad. Sci., 7, 37, 
1900. 
Rhodia parvifrons Rathbun, H. A. E., 10, 175, 1904; Weymouth, Stanford 
Univ. Publ., Univ. Ser., no. 4, 34, pl. 7, fig. 18, 1910. 
a 
Wirz A Se Ge ) 
“AY = 
x ze 
Fig. 135. Herbstia parvifrons, fg, X about 1% (after Milne Edwards). 
Characters.—Carapace ovate, punctate, flattened above, armed with several 
small tubercles and somewhat hairy; gastric region in front with four, at times 
inconspicuous tubercles in a transverse row, a median rounded tubercle on the 
posterior portion of the gastric region; three or four small tubercles on the cardiac 
region, and about five on each branchial region; two tubercles in a transverse line, 
on the intestinal area. Rostral horns very short, one-ninth to one-tenth the length 
