"Phylogenetic" Quotes from Famous Books
 ... shuffling over the ground or swimming a little above it. Flat-fishes move by means of undulations of the dorsal and ventral fins. Increased movement produces hypertrophy, and according to the theory here maintained, not merely enlargement of parts existing, but phylogenetic increase in the number of such parts, here fin rays and their muscles. In Flat-fishes the dorsal and ventral fins extend along the whole length of the dorsal and ventral edges: the dorsal from the head, in some cases from a point ...
— Hormones and Heredity • J. T. Cunningham
... not only in the selection but also in the arrangement of the material. A certain succession of stages was observed, the occasional factors are rendered prominent, the constitutional ones are left in the background, and the ontogenetic development receives greater consideration than the phylogenetic. For the occasional factors play the principal role in analysis, and are almost completely worked up in it, while the constitutional factors only become evident from behind as elements which have been made functional through experience, and a discussion of ...
— Three Contributions to the Theory of Sex • Sigmund Freud |
