20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



simply terminations of those of A. lindbergi. The male palmar 

 border of gnathopod 2 in A. annenkovae is furnished UTegularly with 

 serrate bumps. The female gnathopod 2 of A. annenkovae is re- 

 markably like the male second gnathopod of A. lindbergi. 

 Distribution: Southern California. 



Atnpithoe plumulosa Shoemaker 



Figures 11, 12 



Ampithoe plumulosa Shoemaker, 1938, pp. 16-19, fig. 1; 1942, p. 39. — J. L. Bar- 

 nard, 1959, p. 37. 



Diagnosis of male: Second and thh'd pleonal epimera rounded 

 behind and at lower corners, no lateral ridges; article 5 of gnathopod 1 

 shorter than 6, hind edge with a truncated lobe, acutely, but slightly, 

 projecting distally, palm obsolescent; gnathopod 2 with elongated 

 rectangular article 6, palm oblique, sinuous, palmar corner well 

 defined, finger stout, curved, fitting palm, article 5 with narrow 

 subacute hind lobe; second articles of both gnathopods with rounded 

 anterodistal lobes, aberrantly acute in gnathopod 2 (fig. 1 li) ; article 

 2 of pereopods 1-2 about 2.4 times as long as broad; ventral edge of 

 article 1 of antenna 1 spiniferous; antenna 1 longer than 2, its flagellum 

 much longer than that of antenna 2, flagellum of antenna 2 scarcely 

 longer than article 5 of peduncle but more than 20-articulate, flagellum 

 and article 5 of peduncle densely setose; outer apical lobules of lower 

 lip slender and much longer than medial lobules; coxa 1 produced 

 forward; peduncular process of uropod 1 vestigial. 



Female: Gnathopod 2 wdth a more oblique, but less sinuous palm 

 than in male, hind lobe of article 5 more obtuse. 



Material: Velero stations 878 (1), 1041 (1), 1221 (7), 1440 (1), 

 1449 (40), 1508 (1), 1509 (4), 2000 (1), 2066 (2), 2080 (19), 4822 (2), 

 4852 (1), 5364 (3), 5^64 (2). Barnard stations 33 (5), 36 (3), 37 (45). 

 Glorietta Bay, San Diego Bay, Mar. 19, 1950, coll. Dr. J. L. Mohr (15) ; 

 Dana Point, Calif., Jan. 25, 1948, in Phyllospadix, coll. Dr. J. L, 

 Mohr (3). Black Warrior Lagoon, Baja California, Mar. 21, 1956, 

 coll. Drs. J. Soule and W. K. Emerson, station 336 (1). 



Records: California intertidal at Santa Catalina Island, Newport 

 Bay, Corona del Mar. Baja California intertidal at Punta Eugenia, 

 20 miles east of Punta Eugenia, Punta Santa Rosalia, Millers Land- 

 ing on "west" side of Bahia Sebastian Viscaino. Cedros Island on 

 Phyllospadix. California subintertidal : near Point Conception 9 

 fms., Gaviota 8 fms., Point Mugu 9 fms., Anacapa Island 15 fms., 

 Newport 11 fms.. La JoUa 1 fm. Mexico: Guaymas. 



Distribution : British Columbia to Ecuador. 



