CALIFORNIA STALK-EYED CRUSTACEA. 127 



it might readily be mistaken for a species of bright red 

 incrusting sponge which is found in similar situations. 



Near Sitka (Brandt); Alaska! Vancouver's Island 

 (Bate); Victoria; Queen Charlotte Island (Newcombe); 

 British Columbia (Bouvier); Port Townsend! Cape 

 Mendocino! Point Arena, Calif.! 



In young specimens the posterior margin of the cara- 

 pace is straighter than in adults; the ridge on the outer 

 surface of the hand is plainer and there may be one or 

 more additional ridges more or less plainly visible. In 

 females the posterior portion of the carapace is very 

 tumid, and the posterior margin bulges backwards more 

 strongly than in the males. 



Cryptolithodes brevifrons Miers. 



Cryptolithodes brevifrons MIKRS, Proc. Zool. Soc. London, 1879, p. 48, 

 Note. BOUVIER, Ann. Sci. Nat. (8), Tome 1, 1896, p. 28. 



This species is described in a foot-note as follows: 

 " There is a dried specimen in the [British] Museum 

 from Vancouver's Island which closely resembles C. 

 typicus, but is distinguished by the form of the rostrum, 

 which is obtusely triangular, and does not project be- 

 yond the anterior margin of the carapax. This I 

 propose to call C. brevifrons." 



Genus Lopholithodes Brandt. 



Carapace broad, pentagonal or hexagonal, convex above; with the mar- 

 gins and upper surface armed with setose tubercles. Rostrum short, spiny. 

 Acicle of the antennae with the margins and generally the upper surface 

 spiny. The terminal joint of the mandibular palp is elongated and flat- 

 tened, and bent backward so as to lie between the concave inner faces of 

 the mandibles. Chelipeds unequal, tuberculated; carpus with a promi- 

 nent lobe on the inner side. Ambulatory legs short, tuberculated, and 

 capable of being folded under the carapace. Basal segment of the abdomen 



