Notes on North American Crustacea. 201 



penult joint lamelliform, acute above ; dactylus long and broad, sublamel- 

 liform. Length of tlie carapax in a male, 1.1 ; breadth, 1.33. 



In general appearance and character of the feet, this species 

 has some resemblance to Huenia heraldica of De Haau, but 

 is easily distinguished by the bifid rostrum destitute of a vertical 

 lamina, by the post-orbital tooth, the different maxillipeds, etc. 



It is a rare species, taken from the stomachs of percoid fishes, 

 (" Cabesones") caught off Monterey, CaL, by A. S. Taylor, Esq. 



liambrus creniilatiis. 



Lamhrus crenulatus Sauss., Crust, nouv. des Antilles et du Mexique, p. 



13, pi. i. f. 4. 



Found at the Tortugas, Fla., by Capt. "Woodbury, 

 LiaHilUrH^ friang^ulus, nov. sp. 



The carapax is of the shape of an equilateral triangle, the posterior 

 margin being nearly straight, and scarcely exceeding the antero -lateral 

 sides in length. This results from the strong projection of the dentated 

 posterior corners of the branchial regions, which almost conceal the 

 ambulatory feet. Antero-lateral margin with about twelve very small 

 granulated teeth, of which three are on the small rounded hepatic region. 

 Surface ornamented with conical tubercles variable in number and size. 

 Eostrum prominent, obtuse, triangular. The base of the movable part 

 of the external antennjB is protected on each side by an over-arching 

 tooth, one arising from the lower margin of the orbit, the other from the 

 anterior corner of the epistome. In the outer maxillipeds the ischium 

 is granulated, the meros tuberculated. Chelipeds rather short, strongly 

 angular and dentated; hand granulated below, but nearly smooth above 

 between the crests, which are high, and unevenly eight- or nine-toothed; 

 the teeth denticulated, the middle one largest. Ambulatory feet per- 

 fectly smooth and glabrous ; dactyli pubescent. Length of the carapax 

 in a female, 0.55 ; breadth, 0*69 inch. 



Cape St. Lucas. J. Xantus. 



