60 CALIFORNIA ACADEMY OP SCIENCES. 



pointed, and the tooth external to the latter obtuse and separated from 

 the postorbital by a fissure, the upper margin of the orbit furnished with 

 two fissures, the merus of the maxillipeds rectangular, notched behind 

 the articulation of the palp, and crossed by an oblique ridge, the chelipeds 

 stout, the merus trigonous and dentate above near the distal end, the car- 

 pus rounded and furnished with a tooth at the inner angle, the hands 

 with a lobe pointing inward at the base of the upper side of the palm, the 

 fingers irregularly dentate within but with the outer margins rounded; 

 the ambulatory legs furnished above with lobulated crests on the carpi 

 and propodi, the dactyls slender and villous, the second segment of the 

 abdomen narrowed distally, the third segment wider at the base than the 

 distal end of the second and touching the coxas of the fifth pair of legs, 

 the last two segments of subequal width, the terminal joint rounded. 



Lophoxanthus bellus (Stimpson). 



Xantho bella STIMPSON, Ann. N. Y. Lye. Nat. Hist., Vol. VII, 1860, p. 204, 

 PI. Ill, fig. 2. BATE, in Lord's Nat. in Vancouver's Island, Vol. II, 

 1866, p. 270. NEWCOMBE, Bull. Nat. Hist. Soc. Brit. Col., 1893, p. 24. 



Xanthodes Hemphillii LOCKINGTON, Proc. Gal. Acad. Sci., Vol. VII, 1877, 

 p. 31. 



Xanthodes Hemphilliana LOCKINGTON, 1. c., 1877, p. 100. 



Lophoxanthus bellus A. MILNE-EDWARDS, Crust. Miss. Sci. au Mex., Pt. V, 

 p. 256, PI. XL VI, fig. 4. 



Lophozozymus ( Lophoxanthus) bellus M.IEKS, Challenger Keports, Vol. XVII, 

 1886, p. 115. 



Lophopanopeus bellus RATHBCN M., Bull. Lab. Nat. Hist., Univ. Iowa, 

 1898, p. 272. 



Carapace flattened behind, convex in front, and transversely nearly 

 plane; surface distinctly areolated, becoming roughened toward the antero- 

 lateral margins. Front generally sinuate, and divided by a median fissure, 

 the outer angles produced into small rounded lobes or teeth, which are 

 separated from the adjacent supraorbitals by a fissure. Postorbital tooth 

 small. The anterior half of the antero-lateral margin is nearly straight, 

 meeting the posterior half at an angle, and furnished with a single low, 

 inconspicuous tooth which is sometimes absent; posterior half furnished 

 with three prominent, subequal, horizontally flattened teeth, the anterior 

 one the least acute. Postero- lateral margins nearly straight, rapidly con- 

 verging. The infero-internal angle of the orbit is produced into a promi- 

 nent pointed tooth; a broad lobe-like tooth at the infero-external angle of 

 the orbit separated from the postorbital above by a fissure. Merus of the 

 maxillipeds subrectangular, the surface with two depressions separated by 

 an oblique elevation. Chelipeds stout, the upper margin of the merus 

 furnished with a few irregular teeth; surface of the carpus more or less 

 roughened, the antero-internal angle furnished with a tooth which is 



