THE CANCROID CRABS OF AMERICA 323 



Santa Catalina Island: Specimens returned to California Academy 

 of Sciences. Carapace of young specimen (18278). 



LOWER CALIFORNIA.— Magdalena Bay; 1917; C. R. Orcutt; 

 3 females, 1 young (50635). 



Affinity. — While the antero-lateral teeth resemble those of L. 

 bellus, the smooth surface and the strong tooth on the manus &\\y it 

 closely to L. frontalis. 



LOPHOPANOPEUS FRONTALIS (Rathbun) 



Plate 152 



Lophozozymus (Lophoxanthus) frontalis Rathbun, Proc. U. S. Nat. Mus., vol. 



16, 1893, p. 236 (type-locality, San Diego Bay; type. Cat. No. 18177, 



U.S.N. M.). 

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



1898, p. 272; Harriman Alaska Exped., vol. 10, 1904, p. 181, pi. 7, fig. 8.— 



ScHMiTT, Univ. California Publ. Zool., vol. 23, 1921, p. 242, text-fig. 144, 



pi. 37, fig. 3. 

 Lophoxanthus frontalis Holmes, Oceas. Papers California Acad. Sci., vol. 7, 



1900, p. 64, p]. 1, figs. 5 and 6. 



Diagnosis. — Dark color of immovable finger runs well back and 

 up on the palm. Hand smooth, upper lobe large. Front prominent. 

 Anterior margin of third lateral tooth nearly transverse. 



Description. — Carapace well areolated, almost smooth. Front 

 prominent, lobes markedly sinuous, middle portion very convex. 

 Third antero-lateral tooth more produced than second or coalesced 

 tooth, its anterior margin nearly transverse. 



Carpus of chelipeds smoother than in L. bellus. Hand smooth, 

 short and high, increasing rapidly in height to distal end; a large 

 tooth or lobe projects inward on inner side of upper margin and 

 extends half length of upper margin. Fingers unusually long. 

 Carpus of ambulator}^ legs shghtly bilobed on anterior or upper 

 margin; propodus narrower than in L. bellus, with convex anterior 

 margin: dactylus slender. 



Color. — The dark color of the immovable finger runs backward and 

 upward on the palm. 



Measurements. — Male holotype, length of carapace 17.2, width of 

 same 23.7, fronto-orbital width 12.5, width of front 6.7 mm. 



Range. — From Santa Monica Bay and Santa Catalina Island to 

 San Diego, California. (Schmitt.) 



Material examined. — 



CALIFORNIA. — Anaheim Bay; from clusters of mussels on 

 piles at low tide; February, 1918; H. N. Lowe; 1 male (52682). 



San Diego Bay; Albatross; 1 male holotype (18177). 



San Diego: San Diego Soc. Nat. Hist.; 1 male (53359). Edward 

 Palmer; 1 male, 1 female (19823), received from Peabody Mus., 

 Yale L^niv. 



