76 Notes on North American Crustacea. 



margins. The chelipeds are unfortunately missing, but they are probably 

 short and thick, as in P. pisum. Length of carapax, 0-17 inch ; breadth 

 a little greater. In this pretty little species the carapax is of a bright 

 crimson color, with a large white spot on either side of the front ; the 

 ambulatory feet crimson, broadly 2- or 3-annulated with white. 



Taken at St. Thomas, by A. H. Riise. 



Pachycheles rudis, nov. sp. 

 Plate I. fig. 5. 



Carapax, antennae, etc., nearly as in P. grossimanus. Sinus of poste- 

 rior margin deep, almost acute at the middle. Surface glabrous, obso- 

 letely granulated, punctate or striated in different parts, Chelipeds 

 very unequal, with a rugose, uneven surface above, irregularly tubercu- 

 lated and granulated ; carpus very short, angular, and projecting in 

 front, but not dentated, convex at the posterior margin ; surface of the 

 carpus strongly granulated, with two longitudinal rows of more promi- 

 nent granules near the middle ; hand subtriangular, with very uneven 

 surface, and a strong protuberance near the middle ; lower surface of 

 the hand glossy and slightly granulated in the middle, but more 

 strongly granulated toward the margins ; no pubescence between the 

 fingers; surface of the fingers like that of the palm. Length of the 

 carapax (along median line) in the male, 0-43 ; breadth 0-46 ; length 

 of greater hand, 0-58 ; breadth 0'36 inch. 



A littoral species like others of the genus. Inhabits the coast 

 of California. Found at Monterey by A. S. Taylor, Esq., at 

 San Luis Obispo by Dr. Newberry, and near San Francisco by 

 Dr. Trask. 



ine^alobracliiuni gTaRtilireriim, nov. sp. 



Sides of the body densely hairy both above and below the bases of 

 the feet. The feet are also hairy. When the chelipeds are folded, the 

 tips of the fingers do not touch each other. The color is whitish where 



