PREFACE iX 
by Dr. J. Deniker, the librarian of the Bibliotheque 
du Muséum d’Histoire Naturelle. 
I had begun in the museum library, which con- 
tains nearly if not every one of Lamarck’s publica- 
tions, to prepare a bibliography of all of Lamarck’s 
writings, when, to my surprise and pleasure, I was 
presented with a very full and elaborate one by the 
assistant-librarian, M. Godefroy Malloisel. 
To Professor Edmond Perrier I am indebted fora 
copy of his valuable Lamarck et le Transformisme 
Actuel, reprinted from the noble volume commem- 
orative of the centennial of the foundation of the 
Muséum d’Histoire Naturelle, which has proved of 
much use. 
Other sources from which biographical details have 
been taken are Cuvier’s é/oge, and the notice of La- 
marck, with a list of many of his writings, in the 
Revue biographique de la Société malacologique de 
France, 1886. This notice, which is illustrated by 
three portraits of Lamarck, one of which has been 
reproduced, I was informed by M. Paul Kleinsieck 
was prepared by the late J. R. Bourguignat, the emi- 
nent malacologist and anthropologist. The notices 
by Professor Mathias Duval and by L. A. Bourguin 
have been of essential service. 
As regards the account of Lamarck’s speculative 
and theoretical views, I have, so far as possible, pre- 
ferred, by abstracts and translations, to let him tell 
his own story, rather than to comment at much 
length myself on points about which the ablest 
thinkers and students differ so much. 
It is hoped that Lamarck’s writings referring to 
