THE WILLIAM H. WEEKS SHELL COLLECTION 



New lists of shells from this famous collection are now in preparation. 

 They will contain many hard-to-get and rare species representing nearly 

 all genera of land and marine shells at most reasonable prices. In addi- 

 tion, new live-collected shells are being received continually through 

 exchange and purchase from all parts of the world and will be offered 

 for sale concurrently. Lists supplied without cost or obligation to all 

 interested persons. All shells are guaranteed for refund. Write: 



GEORGE E. JACOBS 

 853 Riverside Drive New York 32, N. Y. 



UNIVERSAL SHELLS 



A new publication, now in press. Cephalopods, Gastropods and 

 Pteropods will appear in the first part. There will be nearly 300 

 pages and about 2,000 figures. An early reservation is recom- 

 mended as only a limited edition will be released. 



First part $7.50 per copy. Address author: 



MAXWELL SMITH 



P. O. Box 8295 Asheville, North Carolina 



FLORIDA SHELLS 



MARINE SHELLS OF THE WESTERN COAST OF FLORIDA 



By 



Louise M. Perry and Jeanne S. Schwengel 



320 pages, 55 plates 



1955 



Revisions and additions to Louise M. Perry's "Marine Shells of the Southwest 

 Coast of Florida". Chapters on generalia, collection and preparation of 

 specimens with clear definitive descriptions of species. Beautifully illustrated 

 by photographs in black and white, including many pictures of egg capsules, 

 eggs, egg collars, embryonic shells, and embryos of gastropods. 



PALEONTOLOGICAL RESEARCH INSTITUTION 



109 DEARBORN PLACE 

 ITHACA, NEW YORK 



PAPER BOUND, ^6.14; CLOTH BOUND, ^7.14 



