PROCEKDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES. 



Third Series. 

 Zoology. Vol. II, No. 2. 



Researches in American Oligochseta, 

 with Especial Reference to those 

 of the Pacific Coast and 

 Adjacent Islands. 



BY 



GusTAv EisEN, Ph. D., 



With Ten Plates. 



Issued January 20, /poo. 



SAN FRANCISCO: 



Published by the Academy. 



1900. 



