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 



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 50 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. 



p. £^ un P ortrail m 



Sera public 

 1<? fr. Le tirage i 



Memoires ^*la SociSte Zoolo- 

 en s'adressant P au Secretaire 



28 RUE SERPENTE, PARIS. 



To Zoologists and Huseums 

 W. F. H Rosenberg 



Importer of Exotic Zoological Specimens 

 57 Haverstock Hill London, N. W. England 



Holds the largest stock in the world of 

 specimens in all branches of Zoology. 



Just published, my new price list of 

 BIRD'S EGGS, containing over 800 spe- 

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 price lists Nos. 6, Bird Skins (over 4,300 

 species), and 7, Mammal Skins, Skeletons, 

 and Spirit Specimens (over 300 species). 



Any of the above price lists sent post-free 

 on application. 



the official organ ■ : i\w Atn^ri- an Association for the 

 Advancement of Science, publishing original article* 

 and notes on the progress of the different branch** of 

 science, the proceedings of scientific societies and 

 academies, reviews of scientific books and articles, 

 !( counts of researches and full discussion 

 and news on all subjects concerning scientific men and 



The Popular Science Monthly 



An illustrated magazine, established in 1872, devoted 

 to the diffusion of science, publishing articles by 

 leading authorities in all departments of pure and 



The American Naturalist 



THE SCIENCE PRESS 



