112 CONTENTS. 



XIII. Sanguiferous System in the Invertebrata, 84 



XIV. Vertebra ta— Pisces, - - .86 



Amphibia, .... 86 



Reptilia, ' - - .87 



. Aves, .... 88 



Mammalia . - . 89 



Recapitulation, --,.... 91 



XV. Respiratory Organs in the Invertebrata, - - - - 92 



XVI. Vertebrata— Pisces, ... 94 



Amphibia, - - . .95 



Reptilia, - - - 95 



Aves, - . . . .95 



Mammalia, ■ . . - 96 



Recapitulation, - . - - - - - 97 



XVII. Organs of Generation in the Invertebrata, ... 97 



XVIII. Vertebra I a— Pisces, . - - 100 



Amphibia, - - 100 



Reptilia, . - - - 100 



Aves, . . . .101 



. Mammalia, - - . - 101 



Recapitulation, - - . ... . - 103 



XIX. Urinary Organs in the Invertebrata, .... 104 



XX. Vertebrata— Pisces, - - . 105 



Amphibia, ..... 105 



Reptilia, - - - - .105 



Aves, . . . - .105 



Mammalia, . - - .106 



Recapitulation, ....... 106 



Names of Authors who have been consulted, - - - 107 



