DECAPOD CRUSTACEANS OF THE 

 NORTHWEST COAST OF NORTH AMERICA 



BY MARY J. RATHBUN 



CONTENTS. 



Introduction 3 



General features 4 



Geographic distribution 6 



Distribution table 8 



Systematic discussion of species 19 



INTRODUCTION. 



THIS report includes primarily the crabs and shrimps collected 

 by the Harriman Expedition. In order to name the shrimps it 

 became necessary to overhaul the large collection of undeter- 

 mined material of that group which has accumulated in the U. S. 

 National Museum. This was derived from several years' work 

 of the Albatross, and from the investigations of Dr. W. H. Dall 

 and others, and embraces the entire coast from Arctic Alaska to 

 southern California. The results of this study are given below, 

 short descriptions of the new species having already been published 

 in the Proceedings of the National Museum (XXIV, pp. 885-905, 

 May, 1902). More than that, the accompanying list of species is 

 designed to serve as a check-list of the Decapoda 1 known to in- 

 habit the region indicated, together with their distribution. 



The collection in the National Museum affords exceptional 



1 The Anomura of the Museum collection, here listed, have been determined by Dr. 

 J. E. Benedict. The Alpheidse are to be reported upon by Dr. H. Coutiere of the Mu- 

 seum at Paris ; therefore the data given herein are quoted largely from Dr. Holmes. 



(3) 



