CONTENTS. 



PART I. — MORPHOLOGY OF VERTEBRATES. 



FAGE 



Introduction ........... i 



Introductory Embryology ........ 5 



Histology ............ 9 



Morphology of the Organs of Vertebrates 17 



Entodermal Organs . . 17 



Mouth 18 



Teeth 19 



Tongue ........... 21 



Oral Glands .......... 21 



Gills 22 



Air bladder 25 



Lungs 26- 



Thyroid Gland .......... 32 



Thymus Gland .......... 33. 



Digestive Tract 34. 



Liver ............ 4Cr 



Pancreas ........... 41 



Ectodermal Structures ......... 45. 



Central Nervous System ........ 43 



Spinal Cord . ........ 44. 



Spinal Nerves 46' 



Brain ........... 48' 



Cranial Nerves ......... 58' 



Sense Organs ....... . . 66 



Lateral Line Organs ........ 67 



Sense Corpuscles ........ 68 



Auditory Organs ........ 69 



Olfactory Organs ........ 79 



Visual Organs ........ 78 



Epiphysial Organs 84. 



Epidermal and Dermal Structures ...... 87 



Skin 87 



Exoskeleton ......... gi 



Scales 92 



Feathers 94. 



Hair 97 



Mesolhelial Structures ......... 100 



