PROCEEDINQS 



WASHINGTON ACADEMY OF SCIENCES 



Vol. IV, pp. 549-560. [Plate xxxv.] September 30, 1902. 



PAPERS FROM THE HOPKINS STANFORD GALA- 

 PAGOS EXPEDITION, 1898-1899. 



XIII. 



MARINE MOLLUSCA. 



By H. a. Pilsbry and E. G. Vanatta. 



CONTENTS. 



Introduction 549 



Catalogue of Species 550 



Descriptions of New Species ' " 556 



Mollusks collected at Cocos Island 559 



INTRODUCTION. 



The collection here reported on was made by Robert E. 

 Snodgrass and Edmund Heller, and forms a part of the zoo- 

 logical museum of Stanford University. A duplicate series, 

 including most of the species, is in the collection of the Academy 

 of Natural Sciences of Philadelphia. 



The molluscan fauna of the Galapagos has recently been 

 catalogued and some new species described by Dr. Robert E. C. 

 Stearns, of Los Angeles, Cal., his results being published in the 

 Proceedings of the U. S. National Museum, 1893, Volume xvi, 

 pp. 353-450. References to the literature are set forth with 

 such fullness in Dr. Stearns's paper that it is not deemed neces- 

 sary to repeat them here. Stearns used chiefly the material 

 collected by the U. S. Fish Commission steamer Albatross^ 

 at James, Indefatigable, Hood, Charles, Chatham and Duncan 



Proc. Wash. Acad. Sci., Sept., 1902. 549 



