62 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



extends proximally. A third large tubercle is situated near articula- 

 tion with manus. The manus is turned so that the upper margin 

 is directed almost upward. The visible surface is very rough with 

 granules, the margin more coarsely so and armed with two large 

 tubercles; margin highest at its proximal third and lowest at its 

 distal fifth. On the inner surface a little below the margin and 

 slightly distad to the most distal of the marginal tubercles, there is 

 another large tubercle. 



The granulation of the cheliped is similar to that of the holo- 

 type carapace, which lends credence to the theory that they are 

 conspecific. 



CANCER PRODUCTUS Randall 



Cancer productus Randall, Jouru. Acad. Nat. Sci. Pliiladelphia, vol. 8, 

 1839, p. 116.— ScHMiTT, Univ. Calif oriiia Pnbl. Zool., vol. 23, 1921, 

 p. 220, text-fig. 136, and synonymy.— T. S. Oldroyd, Proc. U. S. Nat. 

 Mus., vol. 65, art. 22, 1924, p. 23. 



Cancer hrewerii Gabb, Palaeontology of California, vol. 2, sec. 1, part 1, 

 1869, p. 1, pi. 1, fig. 1 (tyiw-locality, near Santa Barbara, Pliocene; 

 tyi>e probably not extant). — Cooper, Seventh Ann. Rept. State Min- 

 eralogist, 1887 (1888), p. 227; "PI. or Mioc." 



Cancer hreweri Arnold, Mem. California Acad. Sci., vol. 3, 1903, p. 345 ; 

 Deadman Island, San Pedro, in Lower San Pedro formation, Pleisto- 

 cene series. 



Gabb compared his species with C. umgister^ instead of C. pro- 

 ductus with which C. hreicerii is identical. This determination is 

 confirmed by the examination of a finger of C. productus from the 

 Pliocene of Ventura Coimty, recently collected h^ Louis N. Waterfall. 



Occurrence. — Pliocene and Pleistocene series : 



CALIFOENIA 



Ventura County: Pliocene; 1 left immovable finger of a large 

 specimen. 



Following are Pleistocene : 



liincon del Potrero, Santa Monica; 30 specimens of fingers more 

 or less incomplete; Cat. No. 353391, U.S.N.M. 



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

 Pedro formation; nine movable, three immovable fingers; Cat. No. 

 353393, U.S.N.M. 



San Pedro; Kate Stephens; two movable fingers. 



Deadman Island, southeast of San Pedro ; four "movable and two 

 immovable fingers. 



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

 San Pedro formation: four movable and one immovable finger; Cat. 

 No. 353390, U.S.N.M. 



