XVI 



LIST OF WOODCUTS. 



» 



n 



if 



n 



FIGURE 



49. Gastrula of Chick . 



50, 51. Four secondary germ- 



layers . , . . 



52-56. Diagrammatic lonorita- 

 dinal and transverse sec- 

 tions through the ideal 

 Primitive Vertebrate 



57, 58. 



59. 



60. 



61. « >» 



62-69. Diagrammatic trans- 

 verse sections through 

 the most important germ- 

 foims of the ideal Primi- 

 tive Vertebrate 



70. Diagrammatic transverse 



sections through various 

 mammalian germs (ex- 

 plaining the separation 

 of the intestine from the 

 yelk-sac). 



71. Gastrula of Mammal . 



72. Intestinal germ-vesicle of 



Mammal 



73. Transverse section through 



the intestinal germ- 

 vesicle of Mammal 



74. Exoderm-cells of the above 



75. Entoderm-cells of the above 



76. Ti-ansverse section through 



germ-area , . 

 77-81. Intestinal germ-vesicle 



of Babbit 

 82, 83. Germ-area of Babbit . 

 84. 

 «5. 



PAGK 



228 



236 



256 

 259 

 263 

 264 

 267 



276 



M 



M 



II 



283 



288 



289 



289 



290 

 290 



293 



294 

 296 

 297 

 298 



II 



it 



)) 



II 



II 



94. Development of egg-mem- 



branes . . . . 



95. Transverse section 



through germ of Chick . 



96. 97. 

 98. 

 99. 



100. Separation of the intes- 



tine from the yelk-sac 

 (diagrammatic) 



101. Longitudinal section 



through embryo Chick . 



102. Longitudinal section 



through head of an 

 embryo Chick 



103-105. Lyre-shaped Chick 

 embryo 



106, 107. Germ-disc or germ- 

 area of Rabbit 



108, 109. „ „ 



110, 111. Skeleton of Man 



112. Transverse section 



through germ of Chick . 



113. Human neck-vertebra 



114. Human chest-vertebra . 



115. Human lumbar-vertebra . 



312 



317 

 318 

 319 

 331 



333 



336 



337 



342 



341 

 345 

 351 



352 

 354 

 354 

 354 



