XVi ILLUSTRATIONS. 



No. Page 



68. Breast-bone of a Wild Swan, with part of the Keel 



removed to show the convolutions of the Trachea 

 within it 232 



69. Point of the Keel-bone, showing the opening through 



which the Trachea enters and returns . . . 232 



70. Trachea of C. Bewickii 234 



71. Singularly formed Windpipe of the Butor . , . 245 



72. Crowned Pigeon of Africa 246 



73. The Wood-thrush 292 



74. Pine Grosbeak, or Hawfinch 299 



75. Chanting Falcon 307 



76 The Polyglot-chat . . . . .320 



77. Lammer Geyer, Bearded Eagle, or Vulture .361 



78. Bernacle, or Claik Goose 363 



79. Bernacle Goose-tree, from Gerard's Herbal . .369 



80. Bernacle Goose-tree, from Aldrovand . . . 372 



81. Bernacle Shell 376 



82. Fowlers of St. Kilda 377 



