CONTEXTS. xvii 



SECTION III. 

 REPRODUCTION. 



CHAPTER I. 



ON THE NATURE OF REPRODUCTION, AND THE ORIGIN OF PLANTS AND 



ANIMALS. 



PAGE 



Nature and objects of the function of reproduction Mode of its accomplish- 

 ment By generation from parents Spontaneous generation Mistaken in- 

 stances of this mode of generation Production of infusoria Conditions of 

 their development Schultze's experiment on generation of infusoria Pro- 

 duction of animal and vegetable parasites Encysted entozoa Trichina 

 spiralis Taenia Cysticercus Production of taenia from cysticercus Of 

 cysticercus from eggs of taenia Plants and animals always produced by 

 generation from parents ...... 525-539 



CHAPTER II. 



ON SEXUAL GENERATION AND THE MODE OF ITS ACCOMPLISHMENT. 



Sexual apparatus of plants Fecundation of the germ Its development into 

 a new plant Sexual apparatus of animals Ovaries and testicles Uni- 

 sexual and bisexual species Distinctive characters of the two sexes 540-543 



CHAPTER III. 



ON THE EGG, AND THE FEMALE ORGANS OF GENERATION. 



Size and appearance of the egg Vitelline membrane Vitellus Germinative 

 vesicle Germinative spot Ovaries Graafiau follicles Oviducts Female 

 generative organs of frog Ovary and oviduct of fowl Changes in the egg, 

 while passing through the oviduct Complete fowl's egg Uterus and ova- 

 ries of the sow Female generative apparatus of the human subject Fal- 

 lopian tubes Body of the uterus Cervix of the uterus . . 544-555 



CHAPTER IV. 



ON THE SPERMATIC FLUID, AND THE MALE ORGANS OF GENERATION. 



The spermatozoa Their varieties in different species Their movement For- 

 mation of spermatozoa in the testicles Accessory male organs of generation 

 Epididymis Vas deferens Vesiculse seminales Prostate Cowper's 

 glands Function of spermatozoa Physical conditions of fecundation 556-562 



2 



