320 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



A^. Upper margin of merus of ambulatory legs spinulous. 



B^ Surface of chclipeds spinulous distinctus, p. 331. 



B^. Surface of chelipeds not spinulous but smooth or nearly so. 



C^. Coalesced (first and second) antero-lateral tooth truncate. Color of 

 immovable finger continued on palm. Carpus of legs distinctly 



bilobed lobipes, p. 329. 



C^. First and second antero-lateral teeth separated by a shallow sinus. 

 Color of immovable finger not continued on palm. Carpus of legs 



indistinctly bilobed maculatus, p. 330. 



Only dactyls of chelipeds known somaterianus, p. 332. 



LOPHOPANOPEUS BELLUS (Stimpson) 



Plates 150 and 151 



Xantho bella Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, p. 204 [76], 



pi. 3, fig. 2 (type-localities, Monterey, Cal. and Fort Townsend, Puget 



Sound; cotype from Monterey in M.C.Z.). 

 Xanthodes hemphillii Lockington, Proc. California Acad. Sci., vol. 7, 1876 



(1877), p. 32 [5] (type-locality, Monterey; type examined but not now extant). 

 Xantho hemphilUana Lockington, Proc. California Acad. Sci., vol. 7, 1876 (1877), 



p. 100 [6]. 

 Lophoxanthus bellus A. Milne Edwards, Crust. R6g. Mex., 1879, p. 257 (part), 



pi. 46, figs. 4-4c. — Holmes, Occas. Papers California Acad. Sci., vol. 7, 



1900, p. 60, pi. 1, fig. 3. 

 Lophozozymus (Lophoxanthus) bellus Miers, Challenger Rept., Zool., vol. 17, 



1886, p. 115. 

 Lophopanopeus bellus Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 



1898, p. 272; Harriman Alaska Exped., vol. 10, 1904, p. 180.— Schmitt, 



Univ. California Publ. Zool., vol. 23, 1921, p. 241, text-fig. 143, pi. 37, fig. 4. 



Diagnosis. — Carapace very rough. Frontal lobes slightly oblique. 

 Anterior margin of third lateral tooth in line with truncate margin of 

 second tooth. Lobe on upper surface of palm low or absent. 



Description. — Carapace roughened along the antero-lateral mar- 

 gin; this margin leads to the orbit and in its anterior part is more pro- 

 nounced in the old, thicker and blunter in the young; lower surface of 

 carapace coarsely granulate. Frontal lobes slightly sinuous and 

 oblique, outer tooth faintly indicated. Anterior margin of third 

 antero-lateral tooth (N of Dana) in line with truncate margin of 

 second tooth or that coalesced with outer orbital tooth. 



Carpus of chelipeds shghtly roughened; transverse subdistal groove 

 deep. Hand smooth, with a thick shallow lobe at proximal end of 

 inner margin of upper surface in the old, lobe not developed in the 

 young. Dark color of fingers not running back on palm. Carpus 

 of all ambulatory legs slightly bilobed on upper margin; propodus 

 with convex upper margin. 



Color. — Very variable; some specimens (in Monterey Bay) are 

 almost pure white, while others show various irregular patterns of 

 bluish and dark red or are wholly of the latter color. 



"Crimson or beet red; carapax sometimes lighter in color, or 

 yellowish, maculated with deep red. Northern specimens are more 

 sober in coloration than those found in warmer latitudes." (Stimpson.) 



