UNIVERSITY OF CALIFORNrA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 18, No. 11, pp. 171-238, plates 6-8, 2 figures in text March 8, 191 J 



THE FACTORS CONTROLLING THE DISTRIBU 



TION OF THE POLYNOIDAE OF THE PACIFIC 



COAST OF NORTH AMERICA 



CHRISTINE ESSENBERG 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



