STATISTICAL STUDIES OF MARINE DIATOMS OF 



THE SAN DIEGO REGION COLLECTED BY 



U.S.S. PIONEER IN MIDWINTER 1923* 



BY 



WINFRED EMORY ALLEN 



(Contribution from the Scripps Institution for Biological Research of the University of California) 



INTRODUCTION 



By far the most important point in connection with the statistical 

 studies here presented is the fact that three scientific organizations 

 successfully cooperated in accumulating and handling the material. 

 The United States Coast and Geodetic Survey, by using its facilities 

 for collecting and by employing the methods of the Scripps Insti- 

 tution for surface observations and collections, was able to gather a 

 large amount of important material ; the Carnegie Institution con- 

 tributed its facilities for taxonomic study ; and the Scripps Institu- 

 tion has contributed its facilities for statistical study of the material. 

 The Coast and Geodetic Survey could not (if it would) handle the 

 material without expanding its resources and applying them in lines 

 subsidiary to the purpose of its existence. The Carnegie Institution 

 could not readily adapt its resources and facilities to the collecting 

 and the statistical examination. The Scripps Institution could not 

 do such collecting and make the taxonomic studies without much 

 greater resources than it has available. Furthermore, much of the 

 information thereby procured is not otherwise obtainable. The three 

 working together can therefore turn out a piece of good scientific 

 work without overstepping bounds or straining resources, and can 

 gain from their cooperation an increased mutual understanding and 

 respect. 



Early in 1923 the U. S. S. Pioneer of the United States Coast and 

 Geodetic Survey, which had been doing topographic work in the 

 vicinity of Scripps Institution, La Jolla, California, made two round 

 trips from San Diego to Cortes Bank, holding a variable course not 

 far from Lat. 32° 35' N. Forty-five samples of microscopic plankton 



* This paper is published by permission of Colonel E. Lester Jones, Director of 

 TJ. S. Coast anrl Geodetic Survey. 



