CONTENTS. 



PAGE. 



Organization and Membership of the Washington Academy of 

 Sciences. .......... i 



Hopkins Stanford Galapagos Expedition. — VII. Arachnida ; by 

 Nathan Banks 49 



Harriman Alaska Expedition. — XXVII. Apterygota ; by J. W. 

 Folsom 87 



Harriman Alaska Expedition. — XXVIII. Hymenoptera ; by W. 

 H. Ashmead. 117 



Hopkins Stanford Galapagos Expedition. — VIII. Brachyura 

 and Macrura ; by Mary J. Rathbun 275 



Harriman Alaska Expedition. — XXIX. The Mosses of Alaska ; 

 by J. Cardot and I. Theriot 293 



Harriman Alaska Expedition. — XXX. Anemones with dis- 

 cussion of variation in Metridium ; by H. B. Torrey. . -373 



Hopkins Stanford Galapagos Expedition. — IX. Shistocerca, 



Sphingonotus and Halmenus ; by R. E. Snodgrass. . .411 

 Hopkins Stanford Galapagos Exposition. — X. Mallophaga from 



Birds ; by Vernon L. Kellogg and Shinkai I. Kuwana . -457 

 Hopkins Stanford Galapagos Expedition. — XI. The Birds of 



Clipperton and Cocos Islands ; by R. E. Snodgrass and E. 



Heller 501 



Hopkins Stanford Galapagos Expedition. — XII. Echinodermata, 



by Hubert Lyman Clark 521 



The Eyes of Rhineura Floridana ; by Carl H. Eigenmann . 533 

 Hopkins Stanford Galapagos Expedition. — XIII. Marine Mol- 



lusca ; by H. A. Pilsbry and E. G. Vanatta . . . 549 

 Index 561 



