22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



Micro jassa. Ischyrocerus litotes at least forms a bridge between the 

 two concepts. Its small size, very shiny, slick body, and poor pig- 

 ment in alcohol make it highly distinctive from other species of 

 Ischyrocerus. 



Distribution: Monterey Bay to San Cristobal Bay, Baja Cali- 

 fornia, 1-157 m. 



Family Leucothidae 



Leucothoe alata Barnard 



Leucothoe alata Barnard, 1959a, pp. 19-20, pi. 1; 1962c, p. 132, figs. 7, D, E, F; 

 1964a, p. 227. 



Material: 6425 (5). 



Distribution: Monterey Bay to San Ramon Bay, Baja Cali- 

 fornia, 0-24 m. 



Leucothoe spinicarpa (Abildgaard) 



Leucothoe spinicarpa — Sars, 1895, p. 100, pi, 101, fig. 1 — Barnard, 1962c, p. 132, 

 figs. 7, A, B, C; 1964a, p. 227. 



Material: 6425 (2). 



Distribution: Cosmopolitan, 0-1505 m. 



Family Liljeborgiidae 



Liljeborgia kinahani (Bate) 



Liljeborgia kinahani. — Sars, 1895, pp. 532-533, pi. 188, fig. 1. — Chevreux and 

 Fage, 1925, p. 157, fig. 157.— Barnard, 1964a, p. 228. 



Material: 6425 (5). 



Distribution: Possibly bipolar, rare in southern California, in the 

 eastern Pacific Ocean known as far south as off San Quintin Bay, 

 Baja California, 24-41 m. 



Listriella diffusa Barnard 



Listriella diffusa Barnard, 1959b, pp. 18-20, figs. 3-5; 1964a, p. 228. 



Material: 6440 (1). 



Distribution: Monterey Bay to San Cristobal Bay, Baja Cali- 

 fornia, 12-172 m. 



Listriella goleta Barnard 



Listriella goleta Barnard, 1959b, pp. 20-22, figs. 5-7; 1964a, p. 229. 



Material: 6427 (1), 6428 (2), 6429 (1), 6431 (1), 6446 (1), 6448 

 (1), 6450 (1), 6451 (2), 6466 (1), 6477 (1), 6480 (1). 



Distribution: Monterey Bay to San Cristobal Bay, Baja Cali- 

 fornia, 12-200+ m. 



