Maps depicting Ichthyoplankton cruises (1937 to 1941) and CalCOFI cruises (1949 to present) Year January February March April May June July August Sept. October Nov. Dec. Year 1937                   1937 1938             1938 1939                     1939 1940                 1940 1941       1941  1942 - 1948 No data 1949       1949 1950   1950 1951 1951 1952   1952 1953