Vergleichung der Embryonen eines Fisches, eines Amphibiums, eines Reptils und eines Vogels auf drei verschiedenen Entwickelungsstufen

Anatomy, Comparative

Embryology

Biological Evolution

Book Illustrations

Lithograph by J. G. Bach from a drawing by Ernst Haeckel

Comparative illustrations of the embryos of a fish, an amphibian, a reptile and a bird. Embryos are depicted in three stages of development, with the earliest stage (I) appearing in the top row and the latest stage (III) appearing in the bottom row. Embryos depicted include that of a fish ("Knochenfisch," F) an amphibian ("Erdsalamander," A), a reptile (a turtle, T), and a bird (a hen, H).

Title from table of contents.

Haeckel, Ernst, 1834-1919

Bach, J. G.

Original image in: Haeckel, Ernst, 1834-1919. Anthropogenie, oder, Entwickelungsgeschichte des menschen (Leipzig : Wilhelm Engelmann, 1874). Bc 25a (Historical Medical Library of The College of Physicians of Philadelphia)

Ernst Haeckel's Anthropogenie, oder, Entwickelungsgeschichte des menschen, a simplified embryology textbook focusing on ontogeny and phylogeny, was first published in 1874. Challenged on the accuracy of its embryological illustrations and it's promotion of the recently developed theories of Darwin, the book's publication was the subject of much controversy. Many of the work's embryological illustrations were borrowed from previous textbooks, along with a few originals by Haeckel himself.

Digitized by the Historical Medical Library of The College of Physicians of Philadelphia

1874

ger

StillImage

Bc_25a.pl4

1 print : lithograph

18 x 13 cm