444 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



materials on boat bottoms, and paired in burrows of echiuroid worm 

 Urechis caupo Fisher and MacGinitie or mud shrimp Upogebia puget- 

 tensis (Dana). 



Material. — The following specimens were examined: 



Mexico.— San Felipo, May 11, 1937, S. A. Glassell, 1 female. 



California. — San Diego, dredged, March 9, 1949, T. E. Bowman, 2 males 

 (USNM 98059).— La Jolla, from kelp holdfasts on beach, Aug. 28, 1918, W. L. 

 Schmitt, 2 females (USNM 53910).— La Jolla, Sept. 21, 1918, W. L. Schmitt, 



1 female, 2 males (USNM 53914).— La Jolla, tide pools, Sept. 22, 1918, W. L. 

 Schmitt, 1 ovigerous female, 9 males (USNM 53925). — La Jolla, Bird Rock, 

 Nov. 3, 1942, 1 female, 1 male (Pacific Marine Station, 846, 847). — La Jolla, kelp 

 beds, March 16, 1954, C. Limbaugh, 1 male (USNM 96415).— Laguna Beach, 

 W. A. Hilton, 1 ovigerous female, 2 males (USNM 48982).— Laguna Beach, W. A. 

 Hilton, 1 ovigerous female, 2 males (USNM 50582). — Laguna Beach, W. A. Hilton, 



2 ovigerous females (USNM 50586). — Laguna Beach, W. A. Hilton, 1 male 

 (USNM 50590).) — Laguna Beach, under stones, W. A. Hilton, 1 ovigerous female, 

 2 males, pale olive-green (USNM 52756).— Newport Bay, Jan. 20, 1929, Dec. 

 16, 1930, G. E. MacGinitie, 1 female, 1 male, 12 juveniles (Hopkins Marine 

 Station). — Santa Catalina Island, west shore of Catalina Harbor, Dec. 12, 1912, 

 Anton Dohrn, 3 females (USNM 49981).— Santa Catalina Island, Nov. 28, 1913, 

 Anton Dohrn, 5 females, 10 males (USNM 49980). — Catalina Island, Isthmus 

 Harbor, Nov. 27, 1913, Anton Dohrn, 9 females, 8 males (USNM 49982).— Catalina 

 Island, west shore of Catalina Harbor, Nov. 28, 1913, Anton Dohrn, 20 juveniles 

 (USNM 50012).— Long Beach, H. N. Lowe, 2 males (USNM 53018).— San 

 Pedro, C. F. Baker, 1 male (USNM 29309).— San Pedro, Rocky Point, Feb. 2, 

 1912, Anton Dohrn, 2 males (USNM 49978).— San Pedro, Portuguese Bend, 

 June 26, 1914, Anton Dohrn, 1 male (USNM 49979).— San Pedro, Government 

 Breakwater and Point Fermin, littoral, April 2, 1913, Anton Dohrn, 3 females, 

 6 males (USNM 49983). — San Pedro, first rocks north of Port Los Angeles, Dec. 

 5, 1911, Anton Dohrn, 3 females, 2 males (USNM 49993).— San Pedro, May 



4, 1919, E. P. Chace, 1 female (USNM 54048).— San Pedro, June 25, 1895, 



5. J. Holmes (?), Univ. of Cahfornia, 20 females (14 ovigerous, 5 parasitized), 

 6 males (USNM 87439). — Santa Monica, near long wharf, Venice Marine Bio- 

 logical Station, 1 male (USNM 46118).— Santa Monica, April 1923, E. P. Chace, 

 1 male (USNM 57174).— Morro Bay, Feb. 2, 1939, S. A. Glassell, 1 male.— Santa 

 Monica, 8 miles north, open beach in Upogebia burrow, Feb. 2, 1931, G. E. 

 MacGinitie, 1 female (Hopkins Marine Station). — Monterey Bay, Elkhorn 

 Slough, April 3, 1930, G. E. MacGinitie, 1 female (Hopkins Marine Station). 



Notes. — Betaeus longidactylus is a stouter species than B. harrimani 

 and may be separated easily on the basis of the chelipeds. The 

 ranges overlap in the region from Newport Bay to Monterey, but 

 few specimens of either species are present in collections from this 

 area. Ricketts and Calvin (1952) state that B. longidactylus is very 

 plentiful in southern California, where it occurs on the outer coast, 

 but in the northern part of its range the species is restricted to quiet 

 waters. Berried females have been taken in January, June, August, 

 and September. 



