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iU 





SOUTHWEST MUSEUM 



Los Angeles 



California 



July 10, 1916. 



Sir: 



I have the honor to submit to your consideration an im- 

 portant manuscript by Dr. ^\^ H. Dall. I recommend its publi- 

 cation as a valuable contril^ution to natural history, specially 

 desirable owing to the present lack of authoritative nomencla- 

 ture in Conchology. 



In appreciation of our earnest, if vouthful research work ; 

 the creation of the division of Conchology in the Southwest 

 ]\Iuseum, and the installation of the famous Golisch collections, 

 Dr. Dall has graciously consented to have the Museum publish 

 his latest contribution to Pacific Coast Conchology. 



The author enjoys international reputation, which is com- 

 plemented by his ofifitial position as Honorary Curator of Con- 

 chology in the United States National Museum. His check list 

 is therefore a specially suitable contribution to the educational 

 aim of our Institution devoted to Scientific Research and Higher 

 Education, as its second publication. 



Yours faithfully. 



Hector Alliot, 



Curator. 



To Doctor Norman Bridge, 



President Southwest Museum. 



