76 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



Range of Recent specimens. — From Point Loma, California, to the 

 Gulf of California. 



Subtribe Oxystomata de Haan 



Family LEUCOSIIDAE Dana 



Carapace more or less hemispherical, hard; afferent openings to 

 gill chambers situate on either side of mouth at base of third maxilli- 

 peds. These last completely close the buccal cavern, the palp wholly 

 concealed by the triangular merus. Antennae small. Legs normal. 

 Abdomen hidden under thorax. Male and female genital openings 

 sternal. 



Genus RANDALLIA Stimpson 



Randallia Stimpson, Proe. Boston Soc. Nat. Hist, vol. 6. 1857. p. 85; type, 

 R. ornata (Randall). 



Carapace strongly convex, subhemispherical, evenly rounded at 

 sides, two lobes or teeth on posterior margin. Front narrow, very 

 short, anterior margin concave. Merus of outer maxillipeds not 

 much shorter than ischium, reaching nearly as far forward as front 

 Chelipeds rather long, hand narrow, fingers acute and somewhat 

 compressed. 



Pleistocene; Eecent. Not before found fossil. 



RANDALLIA ORNATA (Randall) 

 Plate 1, figs. 13 and 14 



Ilia ornata Randall, Journ. Acad. Nat. Sci. Philadelphia, vol. 8, 1839 p 



129. 

 Randallm ornata Schmitt, Univ. California Publ. Zo.'Jl., vol. 23, 1921, p. 



188, text-flg. 116, and synonymy. — T. S. Oldboyd, Proc. U. S. Nat. Mus., 



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



Occurrence. — California ; Pleistocene : 



Rincon del Potrero, Santa Monica; about 500 arms, 30 fingers and 



1 hand with wrist attached; Cat. No. 353345, U.S.N.M. 



Long wharf, Santa Monica; two arms; Cat. No. 353344, U.S.N.M. 

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

 Pedro formation; one arm and fraginents of two others. 

 Deadman Island, southeast of San Pedro; six arms. 

 Signal Hill (or Los Cerritos), north of Long Beach; 14 arms and 



2 movable fingers (pi. 1, fig. 13). 



Spanish Bight, San Diego Bay; 13 arms, 1 immovable finger 

 (pi. 1, fig. 14). 



Range of Recent specimem. —From. Mendocino County, California, 

 to Magdalena Bay, Lower California. 



