216 University of California Publications in Zoology (Vou. 23 
of the carapace. Spine at antero-external angle of basal antennal joint prominent; 
on margin behind it there are two spines, posterior of which is sometimes reduced 
to a small blunt tooth. Preocular spine present acute; there is a small spine 
or tooth on margin of orbit above postocular tooth, while below it there is a spine 
on the inferior orbital margin; beside postocular tooth anterolateral margin is 
furnished with about five spines, and there are several smaller ones on the postero- 
lateral margin. 
Dimensions.—Type: length of carapace scarcely 25.4 mm. 
Color.—Carapace is light tan mottled with dark brown; the ambulatory legs 
are banded with reddish brown and the chelipeds, with the exception of the light 
tips of the fingers, are a still more pronounced red, usually covered with sponges 
of various kinds and the like (Weymouth). 
Type Locality Western America. 
Distribution—-From Monterey Bay, California, to Acapulco, Mexico; low tide 
to 40 fathoms. 
Remarks.—Miss Rathbun has called my attention to the fact that the genus 
Herbstia is not invalidated by Herbstiwm of Leach, 1823, hence its restoration 
above. 
Superfamily BRACHYRHYNCHA 
KEY TO THE CALIFORNIA FAMILIES OF THE BRACHYRHYNCHA 
I. Carapace usually round or transversely oval, circular rather than square; 
squarish in the Goneplacidae. Frontal region not markedly broad, gen- 
erally produced horizontally in lobes or teeth. Frontal and lateral 
margins produced into spines, or teeth. Palp of third maxillipeds 
articulates at or near antero-internal angle of merus. Male genital 
openings coxal. 
A. Legs flattened and more or less distinctly adapted for swimming. An- 
tennules fold back transversely or obliquely. Front with or without 
median tooth. Outer maxillipeds not overlapping endostome. (Only 
one specimen ever reported north of Santa Monica Bay.) 
B. Legs not adapted for swimming. ; 
Portunidae, p. 236. 
1. Antennules fold back longitudinally. Front with several teeth, one 
of which is median. Outer maxillipeds overlapping endostome. 
a. Carapace subcircular; antennal flagella long and hairy. (Known 
only from northern California. ) : 
Atelecyclidae, p. 234. 
b. Carapace broadly oval; antennal flagella usually short, more or 
less hairy. 
Cancridae, p. 217. 
2. Antennules fold back transversely or obliquely. Front generally 
divided by a median notch. 
a. Carapace more or less transversely oval. Fingers of chelipeds 
more or less curved. Fronto-orbital border not equalling 
width of carapace. : 
Xanthidae, p. 238. 
b. Carapace squarish. Fingers of chelipeds practically straight 
longitudinally. Fronto-orbital border nearly equalling width 
of carapace. (Not known north of San Pedro.) 
Goneplacidae, p. 248. 
