24 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



San Pedro; one dactyl of left cheliped; Cat. No. 353355, U.S.N.M. 



Deadman Island, southeast of San Pedro ; one movable finoer. 



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

 San Pedro formation ; piece of merus of ambulatory leg. 



Spanish Bight, San Diego Bay: end of propodal finger of left 

 cheliped. 



Rcmge of Recent specimens. — From Vancouver Island to San 



Diego Bay. 



Genus SCYRA Dana 



Scitra Dana, Amer. Joiirn. Sci., ser. 2, vol. 11, 1S51. p. 269; type, 8. 

 acuUfrons Dana. — Rathbun, Bull. U. S. Nat. Mus., No. 129, 1925, p. 195. 



Carapace subpyriform, with few or no spines; rostral horns 

 flattened, sharp-pointed. Orbits small, a fissure above and below, 

 preorbital spine present. Hand compressed, carinated above ; fingers 

 with sharp, crenulated prehensile edge. 



Pleistocene : Recent. Not before found fossil. 



SCYRA ACUTIFRONS Dana 



Scyra acutifrom Dana, Amer. Jouru. Sci., ser. 2, vol. 11, 1851, p. 269.— 

 Rathbun, Bull. U. S. Nat. Mus.. No. 129, 1925, p. 195, pis. 79 and 224, 

 figs. 4 and 5. 



Occurrence. — California ; Deadman Island, southeast of San Pedro ; 

 Pleistocene series; three movable fingers and a right manus with 

 fixed finger attached. 



Range of Recent specimens. — From Kodiak to San Diego. 



Genus LOXORHYNCHUS Stimpson 



Loxorhynchus Stimpson, Jouru. Boston Soc. Nat. Hist., vol. 6, 1857, p. 451 

 [10] ; type, L. yrandis Stimp.son. — Rathbun, Bull. U. S. Nat. Mus^. No. 

 129, 1925, p. 198. 



Of large size. Carapace pyriform, rough and hairy; rostrum 

 bifid, deflexed. Orbits imperfect, preorbital tooth strong, postorbital 

 acute. Basal antennal article broad. Chelipeds of male much en- 

 larged, extremities dentate or crenate, dactylus flat-topped at base 

 ynd with a large basal tooth in gape. 



Pliocene — Recent. 



LOXORHYNCHUS GRANDIS Stimpson 



Plates 2 aud 3 ; plate 4, fig. 1 



Loxorynchus grandis Stimpson, Proc. Boston Soe. Nat. Hist., vol. 6. 1857, 



p. 85. 

 Loxorhynchus yrandis Stimpson, Journ. Boston Soe. Nat. Hist., vol. 6. 1857, 



p. 452, pi. 20, fig. 1 ; pi. 22, fig. 1. — Rathdun, Proc. U. S. Nat. Mus., 



vol. 35. 1908, p. 342, pis. 45. 46, 47, fig. 1 : Bull. U. S. Nat. Mus.. No. 129, 



1925. p. 198, text-fig. 80, pis. 64 and 65. 



