216 University of California Publications in Zoology [ VoL - 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. 



Bemarlcs. — Miss Eathbun has called my attention to the fact that the genus 

 Herbstia is not invalidated by Herbstium 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 no rth of Santa M onica Bay.) 



B. Legs not adapted for swimming. ^\ f 



6 ^ \ Portunidae, p. 236. J 



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. 



