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 Bibliothèque du Muséum 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 Muséum d’Histoire Naturelle, which has proved of much use.

Other sources from which biographical details have been taken are Cuvier’s éloge, and the notice of Lamarck, 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 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 with much diffidence, though the pleasure of collecting the materials and of putting them together has been very great.

Brown University, Providence, R. I.,
October, 1901.

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