FISHERY BULLETIN: VOL. 72, NO. 4 



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from the Los Angeles County Museum, Scripps 

 Institution of Oceanography, and the Southwest 

 Fisheries Center. A total of 260 samples from the 

 years 1950 to 1969 were examined. Most of the 

 samples were taken in the deepwater basins off 

 southern California, but two samples of S. alas- 

 canus were taken as far north as Crescent City, 

 Calif., and one sample of S. altiuelis was from the 

 vicinity of Guadalupe Island, Baja California. 



The composite monthly size frequencies of 

 mid-water trawl specimens of S. altiuelis are 

 shown in Figure 13. Two major size classes are 

 present from May through September. One class 

 is formed by larvae and transforming specimens, 

 less than 20 mm in length, from the January- 

 May spawning season. The other class is formed 



STANDARD LENGTH (mm) 



Figure 13. — Composite monthly size frequencies for larvae and 

 pelagic juveniles of Se6asto/o6usa/<((;e/£s from mid- water trawls. 



882 



