It was not until many years after (1830) that Thompson proved by their life-history that barnacles are true crustacea.
In the _Philosophie zoologique_ the ten classes of the invertebrates are arranged in the following order: _Les Mollusques._ _Les Cirrhipedes._ _Les Annelides._ _Les Crustaces._ _Les Arachnides._ _Les Insectes._ _Les Vers._ _Les Radiaires._ _Les Polypes._ _Les Infusoires._ At the end of the second volume Lamarck gives a tabular view on a page by itself (p.

463), showing his conception of the origin of the different groups of animals.

This is the first phylogeny or genealogical tree ever published.
TABLEAU Servant a montrer l'origine des differens animaux.
Vers.

Infusoires.
.

Polypes.
.