CONTENTS 



Chapter 



Page 



Part I General Biology 19-432 



I. Why To Study 19 



II. How To Study 27 



III. The Co-ordination of Subjects Studied 34 



IV. The Frog 43 



V. The Cell 88 



VI. The Chemistry of Living Matter and Cell Division 94 



VII. Histology of the Frog 108 



VIII. Summary of the Frog 117 



IX. The Protozoa 121 



X. Interpretation of the Facts thus far presented. 157 



XI. Genetics 165 



XII. Animal Psychology 172 



XIII. Intermediate Organisms 185 



XIV. Immunity 194 



XV. The Plant World 202 



XVI. The Plant World Continued 215 



XVII. The Coelenterata 247 



XVIII. Introduction to the Coelomata 258 



XIX. The Earthworm 262 



XX. Flatworms (Platyhelminthes) and Threadworms 



(Nemathelminthes) 285 



XXI. The Arthropoda 312 



XXII. Insects at Large 328 



XXIII. The Grasshopper 332 



XXIV. The Honey Bee 353 



XXV. The History of Biology 375 



XXVI. Paleontology 393 



XXVII. Evolution 402 



XXVIII. Classification 414 



Part II Introductory Embryology 433-663 



(Chick, Frog, Mammal) 



EMBRYOLOGY OF THE CHICK 435-542 



XXIX. The Development of the Embryo before the Egg is laid. 435 



XXX. The Primitive Streak and Origin of the Mesoderm .... 455 



XXXI. The Four to Six Somite Stage (About 24 Hours) 465 



XXXII. The First Half of the Second Day (24-36 Hours) 470 



XXXIII. The Second Half of the Second Day (36-48 Hours) .... 476 



XXXIV. Extra-Embryonic Membranes '. . . . 485 



XXXV. Development of the Third Day 489 



