ng the centennial of the foundation
of the Museum, has been of essential service.

My warmest thanks are due to M. Adrien de Mortillet, formerly secretary
of the Society of Anthropology of Paris, for most essential aid. He
kindly gave me a copy of a very rare pamphlet, entitled _Lamarck. Par un
Groupe de Transformistes, ses Disciples_. He also referred me to notices
bearing on the genealogy of Lamarck and his family in the _Revue de
Gascogne_ for 1876. To him also I am indebted for the privilege of
having electrotypes made of the five illustrations in the _Lamarck_, for
copies of the composite portrait of Lamarck by Dr. Gachet, and also for
a photograph of the _Acte de Naissance_ reproduced by the late
M. Salmon.

I have also to acknowledge the kindness shown me by Dr. J. Deniker, the
librarian of the Bibliotheque du Museum d'Histoire Naturelle.

I had begun in the museum library, which contains nearly if not every
one of Lamarck's publications, 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 for a copy of his valuable
_Lamarck et le Transformisme Actuel_, reprinted from the noble volume
commemorative of the centennial of the foundation of the Museum
d'Histoire Naturelle, which has proved of much use.

Other sources from which biographical details have been taken are
Cuvier's _eloge_, and the notice of Lamarck, with a list of many of his
writings, in the _Revue biographique de la Societe 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 eminent
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, preferred, 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 the evolution theory
may, at no distant date, be reprinted in the original, as they are not
bulky and could be comprised in a single volume.

This life is offered wit