In a remarkable essay 3 Meckel remarks: ' ` There is no good physiologist who has not been struck by the observation that the original form of all organisms is one and the 1 " 11 s'agit donc de prouver que la serie qui constitute l'echelle animale reside essentiellement dans la distribution des masses principales qui la composent et non dans celle des especes ni meme touj ours dans celle des genres."
Meckel proceeds to exemplify the thesis, that the lower forms of animals represent stages in the course of the development of the higher, with a large series of illustrations.
Meckel, "Anatomie des Gehirns der Vogel," in Meckel's Archiv f.
Meckel, 3 on the other hand, while equally accepting Brongniart's classification, retained the term Amphibia in its earlier Linnaean sense; and his example has been generally followed by German writers, as, for instance, by H.
The greatest of all investigators of animal structure in the 19th century was Johann Miller (1801-1858), the successor in Germany of the anatomists Rathke (1793-1860) and Meckel (1781-1833).
Thus the recapitulation law, which had been built up independently from the observations and speculations on vertebrates by Lorenz Ofen (1779-1851), Johann Friedrich Meckel (1781-1833), St Hilaire, Karl Ernst von Baer (1;92-1876) and others, and had been applied (1842-1843) by Karl Vogt (1817-1895) and Agassiz, in their respective fields of observation, to comparison of individual stages with the adults of the same group in preceding geological periods, furnished the key to the determination of the ancestry of the invertebrates generally.
Meckel (1781-1833) he edited the Archiv fur Anatomie and Physiologie.