ENCHYTR^ID^E OF THE WEST COAST 

 OF NORTH AMERICA 



BY GUSTAV EISEN 



CONTENTS 



Introduction I 



Synopsis of subfamilies and genera II 



Systematic discussion of genera and species 13 



Bibliography 121 



Abbreviations used In text figures 124 



Abbreviations used in plates 125 



Index 126 



INTRODUCTION 



THE following paper is based principally on the Enchy- 

 traeidae collected by the Harriman Expedition to Alaska in 

 1899. The specimens were placed at my disposal for study by 

 Prof. W. E. Ritter, of the University of California, and by 

 Prof. Trevor Kincaid, of the University of Washington. At 

 the time these specimens were sent me, I was already working 

 up a collection of Enchytraeidas previously obtained in Alaska 

 by Prof. Trevor Kincaid and Prof. W. A. Setchell, the latter 

 principally on the island of Unalaska. Other specimens had 

 been received from Dr. Richard C. McGregor, of San Fran- 

 cisco, and still others had been collected by myself. Another 

 small collection had long been in my possession, having been 

 brought together by Dr. Anton Stuxberg during the Vega 

 Expedition under Baron A. E. Nordenskiold in 1877. Of the 



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