AREA COVERED 



The area covered during the survey is shown in figure 1. Not all 

 of the 167 stations shown vjere occupied monthlyj as can be seen from 

 the following tabulation, only 93 to IhO stations were occupied on a 

 given cruise. 



Total 990 926 



The nximber of stations scheduled for each cruise is shown in text 

 table lo A simplified tabulation giving the station lines scheduled 

 for each cruise and the vessel assigned to work each line is given in 

 text table 2, Most stations were occupied six to eight times during 

 the season, but stations on the northernmost line were occupied only 

 once (cruise 17) and on the next adjacent line only twice (cruises 17 

 and 16) . 



Three vessels participated in each of the monthly cruises. The 

 Crest , operated by the Scripps Institution of Oceanography, and the 

 Black Douglas , operated by the U. S. Fish and Wildlife Service, took 

 part in all of the eight cruises, while the third participating 

 vessel was either the Horizon or the Paolina T., operated by Scripps. 

 Three of the vessels successfully occupied 97 percent or more of the 

 stations assigned to them. 



METHODS OF SMPLING 



Fish eggs and larvae \-jere collected by plankton nets that measure 

 1.0 meter in diameter at the mouth by about 5 meters in over-all 

 length. The nets were constructed of No. 30xxx grit gauze, a rugged 

 grade of Sxviss silk bolting cloth. A sketch of the type of net 

 employed has been given in a previous report (Ahlstrom 19ii£, fig. It). 



