!9 21 ] 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. 

 Bostrum 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. Reg. Mex., 



78, pi. 18, fig. 3, 1879; Holmes, Occas. Papers Calif. Acad. Sci., 7, 37, 



1900. 

 Blwdia parvifrons Rathbun, H. A. E., 10, 175, 1904; Weymouth, Stanford 



Univ. Publ., Univ. Ser., no. 4, 34, pi. 7, fig. 18, 1910. 



Fig. 135. Herbstia parvifrons, £, 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 



