THE FOSSIL STALK-EYED CRUSTACEA 33 



lower distal end where it is smooth. It must be borne in mind that 

 punctae of an impression represent granules in the actual object and 

 vice versa. 



Measurements. — Male, length of second sternal segment close to 

 abdomen 3.8 mm., width of same 11.7 mm., length of second sternal 

 segment 5.3 mm., width of same 11.6 mm., length of fifth abdominal 

 segment 5.4 mm., length of sixth abdominal segment 6.7 mm. 



Occurrence. — California : 5I/2 miles southeast of Santa Rosa, 

 three-tenths of a mile upstream from bridge crossing Matanzas 

 Creek, on the left bank, four-tenths of a mile north of Grangers Hall, 

 Sonoma County ; Pliocene (?) series ; one specimen showing an 

 impression of a part of sternum and male abdomen ; also impression 

 of a palm which may not belong to the same individual. 



This specimen was at one time encased in a nodule which later was 

 broken and eroded until finally the crab itself was liberated. The 

 triangular, compressed, waterworn fragment in hand contains the 

 remnants (impressions or fragments) of about half a crab, the right 

 half, three smaller openings showing evidences of ambulatory legs 

 while the larger openings expose the position of the manus and the 

 ventral surface of the body as described above. 



HEMIGRAPSUS NUDUS (Dana) 



Pseudograpsiis nudns Dana, Proc. Acad. Nat. Sci. Philadelphia, vol. 5, 



1851, p. 249. 

 Hemigrapsus nudus Schmitt, Univ. California Pnbl. Zool., vol. 23, 1921, p. 



273, pi. 47, text-fig. 161, and synonymy.— T. S. Oldroyd, Proc. U. S. 



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



Occurrence. — California ; Pleistocene series : 



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

 Pedro formation; 17 movable fingers; Cat. No. 353359, U.S.N.M. 



Deadman Island, southeast of San Pedro; six movable fingers. 



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

 San Pedro formation ; one movable finger. 



Spanish Bight, San Diego Bay; one left manus, fingers and wrist 

 of a small specimen ; Cat. No. 353358, LT.S.N.M. 



Range of Recent sfechnens. — From Sitka to Gulf of California. 



HEMIGRAPSUS OREGONENSIS (Dana) 



Pseudograpsus oregonensis Dana, Proc. Acad. Nat. Sci. Philadelphia, vol. 5, 



1851, p. 248. 

 Hemigrapsus oregonensis Schmitt, Univ. California Pnbl. Zoi)l., vol. 23, 



1921, p. 274, pi. 48, text-fig. 162, and synonymy.— T. S. Oldroyd, Proc. 



U. S. Nat. Mus., vol. 6.5, art. 22, 1924, p. 23. 



Occurrence. — California; Pleistocene series: 



3020—26 4 



