112 CALIFORNIA ACADEMY OF SCIENCES. 



Pleuroncodes planipes St. 



Plettroncodea planipes STIMPSON, Ann. N. Y. Lye. Nat. Hist., Vol. VII, 

 1860, p. 245. A. MILNK-EDWARDS, and BOUVIER, Ann. Sci. Nat. (7), 

 T. XVI, 1894, pp. 248 and 245. 



Closely allied to P. monodon from the coast of Chili. Carapace crossed 

 by setose strife but, with the exception of a few spinules behind the supra- 

 orbital teeth, devoid of spines. Rostrum long, very slender, scabrous 

 above, and continued back upon the carapace as a carina; supraorbital 

 teeth spine-like. A spine at the rounded antero-lateral angle of the cara- 

 pace, behind which there are a few spines on the margin. Ocular ped- 

 uncles not reaching the tip of the rostrum; eyes large. Maxillipeds with 

 a small spine at the antero-internal angle of the ischium; penultimate 

 joint moderately dilated. Chelipeds long, slender, and spinous; merus 

 slender, trigonous, spinulous, especially on the edges, and generally ex- 

 ceeding the tip of the rostrum; carpus spinous; hand long, narrow, 

 spiuulous, with the upper and lower margins parallel; fingers slender, 

 straight, longer than the palm, the tips curved. Ambulatory legs sca- 

 brous, ciliated, with the penultimate joints flattened. Abdomen devoid of 

 spines. 



"This species," says Stimpson, "lives in the open 

 ocean, and is sometimes found in vast quantities in the 

 Pacific off the American Coast. It was taken by Mr. 

 Grayson in N. lat. 24, W. Ion. 130. In March, 1859, 

 it was thrown ashore in considerable numbers at Mon- 

 terey, California." 



Ninety miles southwest of San Francisco, Calif.! 150 

 miles southwest of Cape St. Lucas, Lower California, 

 numerous specimens! 



Subtribe PAGURIDEA. 



Carapace with a lateral (anomoural) line. Pterygostomian regions free 

 from the epistome. External antennae with a five-jointed peduncle and, 

 generally, with an acute, movable acicle. First pair of pereopods large, 

 chelate, often unequal; last pair small and generally more or less chelate. 

 Abdomen asymmetrical, the lower and often the upper side membranous; 

 the appendages generally reduced or absent, and commonly occurring only 

 on one side. 



