TERMS FOR ADVERTISING. 



One Insertion. Two Insertions. One Year. 



Full Page, $5 00 $8 00 $15 00 



Half Page, 3 50 5 50 10 00 



Quarter Page, 2 50 4 00 7 50 



Eighth Page, 1 75 2 75 5 25 



COLLECTION OF SHELLS FOR SALE. 



A fine collection of named shells, 



from V200 to IJ^OO species, 

 many varieties, 



and over 8000 specimens. 



For further infonnatioii iiKjuire (jf 



D. W. FERGUSON, 



N. Y. Gas Light Co., 



Hester, cor. Elizabeth Sts., 



2 t. ]N E\^ ^"ORK. 



WANTED TO EXCHANGE, 



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

 part of the world except Europe. 



A]. ply to Dr. JAMES G. COX, 



130 Philip Street, 

 Sydney, 

 1 yr. New South Wales. 



TO EDUCATIONAL INSTITUTIONS AND COLLECTORS. 



The subscribor 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. Addi-ess 



JNO. G. COOPER, M. D., 



San Francisco, Gal.. 

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

 2t. Academy of Natural Sciences, Phila. 



TO COI^TOi3:OX^OGI-ISTS. 



FOR SAI.E, 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. 



