CONTENTS. 



PART I. -MORPHOLOGY OF VERTEBRATES. 



PAGE 



Introduction . . 



Introductory Embryology . 



Histology .*'*. " .. * ':' * ' 

 Morphology of the Organs of Vertebrates . . -s 



Entodermal Organs . . .. - - 



Mouth . . ., .-.. 



Teeth . . . . . . . * -- '9 



Tongue . . ..... 



Oral Glands . . ... 2I 



Gills ..... - . . ..... 22 



Air bladder . . . " . ' 2 



20 



Thyroid Gland .... 



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



Digestive Tract . . . ...... 34 



40 

 Liver ........ ^ 



Pancreas . . . ***___" 

 Ectodermal Structures ........ 



Central Nervous System ........ 



Spinal Cord .......... 



Spinal Nerves . ..... 



Brain .... ..... ; 



Cranial Nerves ......... 



Sense Organs .. 



Lateral Line Organs ... ^ 



Sense Corpuscles ..* 



Auditory Organs ........ 



Olfactory Organs ....... '^ 



Visual Organs ...* ' 



Epiphysial Organs ........ 



Epidermal and Dermal Structures ...... Jj 



Skin . . . . ...... 



Exoskeleton ....*' 



Scales .......... 92 



Feathers ......... 



Hair ...... .... 



Mesothelial Structures ..... 



v 



