The American Journal of Science 



Established by Benjamin Silliman in 1818. 



The Leading Scientific Journal in the United States 



Devoted to the Physical and Natural Sciences, with special reference to 

 Physics, and Chemistry on the one hand, and to Geology and Mineralogy 

 on the other. 



Editor: EDWARD S. D*NA. 



Associate Editors: Professor GEORGE L. OOODALE, JOHN TROW8RIOQE, W. G. FARLOW and WM. n. DAVIS 

 of Cambridge : Professors A. E. VERRILL, HENRY S. WILLIAMS ana L. V. PIRS^ON, of New 

 Haven; Professor G. F. BARKER, of Philadelphia; Professor JOSEPH S. AIMES, 



Two volumes annually, in monthly numbers of about 80 pages each. 



This Journal ended its first series of 50 volumes as a quarterly in 1845 ; its second 

 series of 50 volumes as a two-monthly in 1870 ; its third series as a monthly ended Dec- 

 ember, 1895. A Fourth Series commenced in 1896. 



Subscription price, $6 per year or SO cents a number, postage prepaid in the United States ; 

 $6.25 to Canada; $6.40 to countries in the Postal Union. Back numbers at reduced prices. 

 B@-Ten-volume Indexes, Vols. I-X, XI-XX, fourth series, price one dollar. Address 



The American Journal of Science 



New Haven, Conn. 



LAMARCK 



sa vie, son oeuvre 

 par MARCEL LANDRIEU. 



secretaire i The Popular Science Month I> 



28 RUE SERPENTE, PARIS. 



To Zoologists and fluseums j 

 W. F. H Rosenberg 



importer of Exotic Zoological Specimens j 

 57 Haverstock Hill London, N. W. England 



Holds the largest stock in the world of j 

 specimens in all branches of Zoology. 



1 ist published, mv new price list of 

 1 !.:.>-;'. , . tii 

 cies from all parts of the world. Also 

 I i--< lists Xos. 6, Bird Skins (over 4,300 

 species , and 7, Mammal Skins, Skeletons, 



if the 



The American Naturalist 



THE SCIENCE PRESS 



