REPORTS ON THE COLLECTIONS OBTAINED BY THE HANCOCK PACIFIC EXPEDITIONS OF 

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

 GALAPAGOS ISLANDS IN 1932, IN 1933, IN 1934, IN 1935, AND IN 1936. 



PLANKTON DIATOMS 

 OF THE GULF OF CALIFORNIA OBTAINED BY 

 THE G. ALLAN HANCOCK EXPEDITION OF 1936 



By W. E. ALLEN 



