Work that came later was in the line of expansion and elaboration of Lamarck's, without any change of principle.

Only with the application of embryology and microscopical work of the most modern type has there come any essential change of method, and this is rather a new method of getting at the facts than any fundamental change in the way of using them when found.

I shall await your work on Lamarck's biography with great interest.
"I remain, "Yours sincerely, "WILLIAM H.DALL." FOOTNOTES: [119] During the same period (1803-1829) Russia sent out expeditions to the North and Northeast, accompanied by the zooelogists Tilesius, Langsdorff, Chamisso, Eschscholtz, and Brandt, all of them of German birth and education.

From 1823 to 1850 England fitted up and sent out exploring expeditions commanded by Beechey, Fitzroy, Belcher, Ross, Franklin, and Stanley, the naturalists of which were Bennett, Owen, Darwin, Adams, and Huxley.

From Germany, less of a maritime country, at a later date, Humboldt, Spix, Prince Wied-Neuwied, Natterer, Perty, and others made memorable exploring expeditions and journeys.
[120] These papers have been mercilessly criticised by Blainville in his "Cuvier et Geoffroy St.Hilaire." In the second article--_i.e._, on the anatomy of the limpet--Cuvier, in considering the organs, follows no definite plan; he gives a description "_tout-a-fait fantastique_" of the muscular fibres of the foot, and among other errors in this first essay on comparative anatomy he mistakes the tongue for the intromittent organ; the salivary glands, and what is probably part of the brain, being regarded as the testes, with other "_erreurs materielles inconcevables, meme a l'epoque ou elle fut redigee_." In his first article he mistakes a species of the myriapod genus Glomeris for the isopod genus Armadillo.