M 



Brachyura and Crab-like Anomura of Friday Harbor, Washington 



Evelyn Way, 

 University of Washington, Seattle. 



This paper is based on (a) material collected by the writer during 

 the summer of 1916, and (b) the examination of material collected by 

 others during previous summers. In case a species has not been found 

 by the writer, but has been reported from the vicinity by others, without 

 the writer having seen the specimens, the fact is mentioned. 



The papers most helpful in the preparation of this article are the 

 key to the genera of the Lithodidae by Holmes (1900), and the Brachyura 

 and Macrura of Porto Rico by Rathbun (1900a). However, others of 

 the most useful works are included among the citations without direct 

 references to them. 



Acknowledgments are due to Professor Trevor Kincaid and Dr. 

 Nathan Fasten of the University of Washington, and to Miss Mary J. 

 Rathbun of Washington, D. C. 



ORDER DECAPODA 



KEY TO THE SUB-ORDERS 



A. Body laterally compressed ; abdominal legs all present, well developed, 

 used for swimming. (natantia. Not included in this papej.) 



AA. Body not laterally compressed; abdominal legs often reduced or 

 lacking, not used for swimming. reptantia (p. 349) 



Sub-order Reptantia 



key to tribes 



A. Carapace not fused with epistome ; last pair of trunk legs weak, folded 

 over the carapce or under the abdomen ; second antennae external 

 to the eye. anomura (p. 350) 



AA. Carapace fused with the epistome; last pair of trunk legs not weak 

 nor folded over the carapace nor under the abdomen; second antennae 

 not external to the eye. brachyura (p. 357) 



(349) 



