CHAPTER IX.. Primitive Polarities—Heredity and Variation.

PRIMITIVE POLARITIES—HEREDITY AND VARIATION.

Heredity in simple forms of life—In more complex organisms—Pangenesis—Varieties how produced—Fixed by law of survival of the fittest—Dr. Temple’s view—Examples: triton, axolotl—Variations in individuals and species—Lizards into birds—Ringed snakes—Echidna 117