56 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



Oligocene; Pleistocene; Recent. Not before found fossil. 



The genus Lo'pJwpanopeus is represented on the coast of Cali- 

 fornia by six Recent species, five of which occur south of Monterey 

 Bay. In the Pleistocene in the neighborhood of San Pedro have 

 been found numerous fragments, chiefly fingers, sometimes attached 

 to a manus which is infrequently accompanied by a carpus. An 

 examination of the fingers of Recent species discloses a strong re- 

 semblance between fingers of different species, especially between 

 those of hellus and diegensis^ of leucomanus and heathii, and of 

 frontalis and lockingtoni. There is on the other hand considerable 

 variation among individuals of a single species from one place. 

 This makes identification of detached fingers difficult and more or 

 less uncertain. The wrists, three in number, are unmistakably L. 

 diegensis^ and the 13 palms are also referable to the same species. 

 The numerous fingers represent at least three species, Avhich I take 

 to be diegensis, leuconimiiis^ and loclcmgtoni. 



LOPHOPANOPEUS DIEGENSIS Rathbun 



Lophopano2)eus dieffensts Rathbun, Amer. Nat., vol. 34, 1900, p. 137. — - 

 ScHMiTT, Univ. California Piibl. Zool., vol. 23, 1921, p. 245, pi. 37, fig. 

 5, and synonymy. — T. S. Oldroyd, Proc. U. S. Nat. Mus., vol. 65. art. 

 22, 1924, p. 23. 



Occurrence. — California ; Pleistocene series : 



Rincon del Potrero, Santa Monica: two right movable fingers; 

 Cat. No. 353377, U.S.N.M. 



Nob Hill (lumber yard), northeast of San Pedro; lower San 

 Pedro formation; many (about 200) specimens of fingers, major 

 and minor, moA^able and immovable, besides five palms and two 

 wrists; Cat. Nos. 353367 and 353368, U.S.N.M. || 



San Pedro; four movable fingers. 1 



Deadman Island, southeast of San Pedro; more than 25 fingers, j 

 8 palms and 1 wrist. 



Signal Hill (or Los Cerritos), northeast of Long Beach: Upper 

 San Pedro formation; one major movable finger. 



Some fingers are larger than any taken from the sea and indicate : 

 that the species was as large as L. hellus, which ranges from Monterey 

 Bay northward. 



Range of Recent L. diegensis. — From Monterey Bay to San Diego 

 Bay. 



LOPHOPANOPEUS LEUCOMANUS (Lockington) 



Xanthodes leucomanus Lockington, rroe. California Acad. Sci.. vol. 



1876 (1877), p. 32 (not leucomanus, p. 100). 

 Lophopanopeus leucomanus Schmitt, Univ. California Publ. Zool., vol. 



1921, p. 243, pi. 37, fig. 6, text-fig. 14.5. and synonymy.— T. S. OLOROYi 



Proc. U. S. Nat. Mus.. vol. 65, art. 22, 1924, p. 23. 



