CONTENTS 



PAGE 



Introduction i 



Introductory embryology 6 



Histology 16 



Epithelial tissues . . 17 



Nervous tissues. . J 9 



Muscular tissues . . 20 



Connective tissues .... 21 



Comparative morphology of vertebrates 25 



Integument . . 25 



Skeleton 37 



Dermal skeleton. . . 39 



Endoskeleton .... 4 2 



Vertebral column 44 



Ribs 53 



Sternum 56 



Episternum . 59 



Skull . . 59 



Skull of cyclostomes 75 



Skull of elasmobranchs 76 



Skull of teleostomes 77 



Skull of amphibia . 



Skull of reptiles . . 87 



Skull of birds .... 95 



Skull of mammals 98 



Appendicular skeleton . 102 



Median appendages 103 



Paired appendages. 103 



Shoulder girdle 105 



Pelvic girdle 109 



Free appendages 114 



Ccelom (body cavities) 120 



Muscular system ... . . 124 



Parietal muscles 125 



Visceral muscles . . 132 



Dermal muscles 134 



Diaphragm 135 



Electrical organs 135 



Nervous system 137 



Central nervous system 138 



Spinal cord 138 



vii 



