CALIFORNIA STALK-EYED CRUSTACEA. 109 



produced and joined to the margin of the carapace; second joint at some 

 distance from the orbit. Chelipeds thick and roughened; carpus short. 

 Dactyls short and terminating in a single claw. 



Type. — P. grossimanus (Guerin). 



Pachycheles rudis St. 



Pachycheles rudis StIiMPSon, Ann. N. Y. Lye. Nat. Hist., Vol. VII, 1862, 



p. 76; Proc. Acad. Nat. Sci. Phila., 1858, p. 228. Lockington, Ann. 



Nat. Hist. (5), Vol. II, 1878, p. 404. Newcombe, Bull. Nat. Hist. Soc. 



Brit. Col., 1893, p. 30. Ortmann, Zool. Jahrb. Abth. f. Syst., Bd. X, 



i 1897, p. 294. 



Carapace nearly smooth, quite strongly convex longitudinally, and finely 

 striated on the branchial regions. Front short, deflexed, entire, and 

 hairy above. Sides of the carapace evenly rounded and marked by a raised 

 line. Sinus in the posterior margin deep and subacute in the middle. 

 Superior margin of the orbit concave but not raised; outer angle of the 

 orbit acute. Distal end of the ischium of the maxillipeds evenly rounded; 

 inner lobe of the merus prominent, rounded. Chelipeds unequal, with a 

 rough, irregular, granulated, or tuberculated upper surface, which is more 

 or less hairy; merus with an anterior tooth; carpus short, about as broad 

 as long, the anterior margin laminate, angular, and often furnished with 

 one or more teeth; the posterior margin is convex and the upper surface 

 bears two more or less evident longitudinal, granulated ridges; hands 

 broad, subtriangular, very uneven above, and furnished with a rounded 

 protuberance near the middle; the lower surface is glossy and very finely 

 granulated at the center, but the granules become larger towards the mar- 

 gins; fingers stout, granulated. Ambulatory legs stout and more or less 

 rugose; dactyls short, curved, and furnished with two or three spines 

 below; posterior margins of the propodi with a few spines. 



Length, 14.5 mm.; breadth, 15.25 mm. 



British Columbia (Newcombe); Humboldt County, 

 Calif., to San Francisco Bay! Monterey! Santa Rosa Is.! 

 Santa Catalina Is.! Found under rocks at low tide. 

 Lockington states that he found young specimens of 

 this species in a bottle of material, without label, from 

 Lower California. 



