of the University of California, the Hopkins Marine Station of Stanford University, 

 the California Department of Fish and Game, and the California Academy of 

 Sciences. The biological -oceanographic cruises are a primary responsibility 

 of the Scripps iistitution of Oceanography and the Bureau of Commercial Fisheries. 



It is with deep pleasure that I acknowledge the cooperation given by the 

 Scripps Institution of Oceanography in the collection of data at sea. Most per- 

 sonnel of the Biological Laboratory, La Jolla, contributed to this project, many 

 devoting their full time to it. Lois Hunter did most of the work of identifying, 

 enumerating and measuring fish eggs and larvae In the 1957 material; James 

 Thrailkill supervised the separation of fish eggs and larvae from plankton col- 

 lections and also prepared the charts included in this report; standardization of 

 egg and larval counts and preparation of the basic tables were done by Margaret 

 Ahlstrom. 



AREA COVERED, 1957 



The area surveyed during 1957 is shown in figure 1. Stations occupied 

 on three or more cruises are shown as black dots, those occupied on 1 or 2 

 cruises as open circles. The most extensive coverage was obtained during 

 June, when the area surveyed extended from off San Francisco, California, 

 (line 60) to below Cape San Lucas, Baja California, (line 157) and offshore to 

 station 90 on many lines. The January cruise was an abbreviated one, because 

 one of the two vessels scheduled to make the cruise was laid up for repairs. 

 Extensive coverage was obtained on seven cruises - February through July and 

 October (text table 1). The area off central Baja California only was surveyed 

 during August and September, while the coverage during November and December 

 was mostly confined to waters off southern California. 



The Gulf of California was surveyed on four cruises during 1957 - in Feb- 

 ruary, April, Jime, and August. Data from the Gulf cruises are not included in 

 this report. 



One to four vessels participated in each cruise. The "Black Douglas" made 

 eight survey cruises (February through September). Five vessels of the Scripps 

 Institution of Oceanography participated in one or more cruises, as follows: 

 "Horizon", four cruises (February, April -June); "Spencer F. Baird", one cruise 

 (February); "Stranger", seven cruises (April -August, October, December); 

 "Orca", six cruises (January, March, May-July, November); "Paollna T", three 

 cruises (July, October, December). Vessels making the Gulf of California 

 cruises are given in the above listing, since these vessels occupied stations on 

 lines 153 and 157 of the regular pattern in addition to the Gulf stations. The 

 vessels used for Gulf of California cruises were as follows: February - "Spencer 

 F. Baird", April - "Black Douglas" , June -"Stranger", August -Stranger". 



