Читать книгу On the Genesis of Species - St. George Jackson Mivart - Страница 8

Table of Contents

SPECIES AND TIME.

Two relations of species to time.—No evidence of past existence of minutely intermediate forms when such might be expected a priori.—Bats, Pterodactyles, Dinosauria, and Birds.—Ichthyosauria, Chelonia, and Anoura.—Horse ancestry.—Labyrinthodonts and Trilobites.—Two subdivisions of the second relation of species to time.—Sir William Thomson's views.—Probable period required for ultimate specific evolution from primitive ancestral forms.—Geometrical increase of time required for rapidly multiplying increase of structural differences.—Proboscis monkey.—Time required for deposition of strata necessary for Darwinian evolution.—High organization of Silurian forms of life.—Absence of fossils in oldest rocks.—Summary and conclusion … Page 128