xvi TABLE OF CONTENTS 



PAGE 



VII. GENERAL EMBRYOLOGY ............. 65 



A. Development of the Starfish . .......... 65 



B. Development of the Frog ............ 66 



VIII. HEREDITY: MENDEL'S LAW ...... ..... 69 



A. First Hybrid Generation .......... . . 69 



B. Second Hybrid Generation ........... 69 



IX. PHYLUM PROTOZOA .... .......... 71 



A. Introductory Remarks ............ 71 



B. The Amoeba .............. 72 



C. Paramecium ............... 73 



D. General Study of Protozoan Cultures ......... 78 



X. PHYLUM COELENTERATA ............. 82 



A. Hydra . ' . ............. 82 



B. A Colonial Coelenterate ............ 86 



C. General Survey of Other Coelenterates ......... 88 



XI. PHYLUM PLATYHET.MTNTHES ............ oo 



A. Planaria ............... 90 



B. General Survey of Other Flat worms ......... 93 



XII. PHYLUM ANNELIDA .............. 95 



A. Preliminary Study of Nereis ........... 95 



B. The Anatomy of the Earthworm ........ 96 



C. General Survey of Annelids ........... 105 



PHYLUM ARTHROPODA .......... . .. . 106 



A. The Anatomy of the Lobster (or Crayfish) ........ 106 



B. The Anatomy of the Grasshopper .......... 117 



C. General Survey of Arthropods ..... ...... 124 



XIV. FINAL EXERCISES ON COMPARATIVE ANATOMY ........ 126 



A. Comparison of Cross-Sections ........... 126 



B. Comparison of Functional Systems .......... 126 



XV. EXERCISE ON CLASSIFICATION ........... 127 



Key to the Phyla of Animals ....... ..... 129 



Key to the Classes of the Principal Phyla ......... 131 



XVI. EXERCISE ON ECOLOGY . ............ 135 



SUGGESTIONS FOR THE LABORATORY ASSISTANTS ......... 139 



INDEX ........... ... 145 



