PYCNOGONIDA OF THE WEST COAST OF 

 NORTH AMERICA 



BY LEON J. COLE 

 CONTENTS. 



Introduction 249 



Geographical distribution 250 



Classification and terminology 253 



Key to the species 258 



Systematic discussion of species 259 



Bibliography 294 



INTRODUCTION. 



THE Pycnogonida collected by the Harriman Alaska Expedi- 

 tion form the basis of the material described in the following 

 pages. They were obtained by those members of the party who 

 devoted their attention to the invertebrate forms, Professor W. E. 

 Ritter, Dr. W. R. Coe, and Professor Trevor Kincaid ; I have also 

 to thank Professor Kincaid for several specimens collected by 

 him upon a previous trip to the Pribilof Islands, in 1897. In 

 addition to the above, the Pycnogonida in the collection of the 

 University of California, from various places along the California 

 coast, were placed at my disposal. Finally several lots, also from 

 California, were turned over to me by Dr. S. J. Holmes, to whom 

 I am indebted for many courtesies. I have been generously 

 permitted to include descriptions of all these forms, so that, 

 with the exception of two previous notes, each describing a 

 new species, of which one is included in the present collections, 

 all that has been written on the littoral Pycnogonida of the 

 west coast of North America will be found in this paper. 



(249) 



