Xii CONTENTS. 



MOB 



Later Separation of the Sexes (Gonochorism). Original Develop- 

 ment of the Two Kinds of Sexual Cells from the Two Primary 

 Germ-layers. The Male Exoderm and Female Entoderm. Develop, 

 ment of the Testes and Ovaries. Passage of the Sexual Cells into 

 the Coelom. Hermaphrodite Eudiment of the Embryonic Epi- 

 thelium, or Sexual Plate. Channels of Exit, or Sexual Ducts. 

 Egg-duct and Seed-duct. Development of these from the Primitive 

 Kidney Ducts. Excretory Organs of worms. " Coiled Canals " of 

 Einged Worms (Annelida). Side Canals of the Amphioxus. 

 Primitive Kidneys of the Myxinoides. Primitive Kidneys of Skulled 

 Animals (Craniota). Development of the Permanent Secondary 

 Kidneys in Amniota. Development of the Urinary Bladder from 

 the Allantois. Differentiation of the Primary and Secondary 

 Primitive Kidney Ducts. The Miillerian Duct (Egg-duct) and the 

 Wolffian Duct (Seed-duct). Change of Position or the Germ-glands 

 in Mammals. Formation of the Egg in Mammals (Graafian Fol- 

 licle). Origin of the External Sexual Organs. Formation of the 

 Cloaca. JEermaphroditism in Man ... ... ... ... 388 



CHAPTER XXVL 



EESULTS OF ANTHEOPOGENY. 



Review of the Germ-history as given. Its Explanation by the Funda- 

 mental Law of Biogeny. Its Causal Eelation to the History of the 

 Tribe. Eudimentary Organs of Man. Dysteleology, or the Doc- 

 trine of Purposelessness. Inheritances from Apes. Man's place in 

 the Natural System of the Animal Kingdom. Man as a Vertebrate 

 and a Mammal. Special Tribal Eelation of Men and Apes. 

 Evidences regarding the Ape Question. The Catarhina and the 

 Platyrhina. The Divine Origin of Man. Adam and Eve. History 

 of the Evolution of the Mind. Important Mental Differences within 

 a Single Class of Animals. The Mammalian Mind and the Insect 

 Mind. Mind in the Ant and in the Scale-louse (Coccus). Mind in 

 Man and in Ape. The Organ of Mental Activity : the Central 

 Nervous System. The Ontogeny and Phylogeny of the Mind. 

 The Monistic and Dnalistic Theories of the Mind. Heredity of tho 

 Mind. Bearing of the Fundamental Law of Biogeny on Psychology. 

 Influence of Anthropogeny on the Victory of the Monistic Philo- 

 sophy and the Defeat of the Dualistic. Nature and Spirit. Natural 

 Science and Spiritual Science. Conception of the World reformed 

 by Anthropogeny ... ... ... ... ... ... 4?2 



NOTES. Remarks and References to Literature ... ... 4o9 



INDEX ... ... ... ... ... ... 491 



