12 4*3 



VOLUME XL 



JULY. 19Q0. 



NUMBER 91. 



THE 



^West*American*ScMtist4- 



A popular monthly review and record for the Pacific Coast 

 Official organ San Diego Society of Natural History. 





CONTENTS: 



It* view of the Cactaceai of the United States. — V. 



Queries and Answers. 



Author's Catalog. 



West American Mollusca. — III. 



Editorial. 



Notes and News. 



57 

 72 

 71 

 63 

 70 

 70 



San Diego, California: 



WEST AMERICAN SCIENTIST: 365 Twenty-first St., 



San Diego, Calif. 



Established I $84 by Charles Russell Orcutt, Editor and 

 Publisher. Price 10 cents a copy, $1.00 a year (twelve con- 

 umbers), $10.00 for life. Back numbers (when avail- 

 able) 20 cents 'a copy; numbers 1-12, 20-33, 66, and others, 

 Wanted. 





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