The Philosophy of Evolution

acquired action acts adapted æther already seen Amoeba amongst amphibian ancestors ancient appears aquatic beauty become believe birds bones buds changes CHAPTER characters Chironectes complex considerable correlated Crustacea Darwin deposits descendants direct embryo energy evidence evidence of evolution evolution excreted existence external extinct extremely facts favour fish Foraminifera formation fossils gemmules genera give rise gradually hence higher highly developed Hipparion hypothesis increase individual influence inheritance inscription lancelet large number larvæ laws less light lower forms mammalia mammals material maturity modification natural selection nitrogen nourishment nutrition occur offspring organs Origin of Species ovum Pangenesis parent patagium penguins period phenomena plasticity Plate probably produce protoplasm pseudopodia race relation reproduction reptiles reptilian result rudimentary similar Sirenia skull specialized sternum strata structure structureless suppose survival tendency tertiary theory tion tissue transitional forms undergo undoubtedly variability variation vary vast number vertebrates vibrations volition whilst wings young