REPORTS ON THE COLLECTIONS OBTAINED BY ALLAN HANCOCK PACIFIC EXPEDITIONS OF 

 VELERO III OFF THE COAST OF MEXICO, CENTRAL AMERICA, SOUTH AMERICA, AND GALA- 

 PAGOS ISLANDS IN 1932, IN 1933, IN 1934, IN 1935, in 1936, in 1937, and in 1938. 



PLANKTON DIATOMS OF THE GULF OF 



CALIFORNIA OBTAINED BY ALLAN 

 HANCOCK PACIFIC EXPEDITION OF 1937 



By E. E. CUPP and W. E. ALLEN 



