TERMS FOR ADVERTISING. 



Full Page, 

 Half Page, 

 Quarter Page, 

 Eighth Paoe, 



One Insertion. 



$5 00 

 3 50 

 2 50 

 1 75 



Two Insertions. 



$8 00 

 5 50 

 4 00 



One Year 



$15 00 



10 00 



7 50 



5 25 



COLLECTION OF SHELLS FOR SALE. 



A fine collection of named shells, 



from 1200 to 14.00 species, 

 many varieties, 



and over 8000 specimens. 



For further information inquire of 



D. W. FERGUSON, 



N. Y. Gas Light Co., 



Hester, cor. Elizabeth Sts., 



2 1. JYEW YORK. 



WANTED TO EXCHANGE, 



Land, Fresh-water and Marine SHELLS of AUSTRALIA for those of any 

 part of the world except Europe. 



Apply to Dr. JAMES C. ('OX, 



130 Philip Street, 

 Sydney, 

 1 yr. New South Wales. 



TO EDUCATIONAL INSTITUTIONS AND S0LLECT0KS. 



The subscriber offers FOR SALE his private collection of the Shells and 

 Mollusks of California and the adjacent States. The series embraces about 

 six hundred and fifty species, carefully named and neatly mounted, and is the 

 best collection of West Coast Shells extant, except the California State Cabi- 

 net. Address 



JNO. G. COOPER, M. D., 



San Francisco, Cal., 

 Or E. J. NOLAN, M. D., 

 2t. Academy of Natural Sciences, Phila. 



TO CONCHOLOGISTS. 



rOR SALE, a very large collection of BOOKS relating to Conchology ; 

 also several thousand named species of SHELLS. 



The above being duplicates, we are anxious to dispose of them at very low 

 prices. For particulars, address 



E. J. NOLAN, M. D., 

 Conservator of Conch. Sect. Acad. Nat. Sciences, 



Cor. Broad and Sansom Streets, Phila. 



