XVI 



LIST OF WOODCUTS. 



FIGURB 



49. Gastrnla of Chick 



50, 51. Four secondary germ- 



layers .... 



52-56. Diagrammatic longitu- 

 dinal and transverse sec- 

 tions tlirougli the ideal 

 Primitive Vertebrate 



57, 58. 



y* 



ft 



n 



9» 



59. 

 60. 



61. a ti 



62-69. Diagrammatic trans- 

 verse sections through 

 the most important germ- 

 forms 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. Transverse section through 



germ-area . . 

 77-81. Intestinal germ-vesicle 



of Babbit 

 82, 83. Germ-area of Eabbit . 

 84. ,) jj 



So. » >j 



276 



283 



288 



289 



289 

 290 

 290 



293 



294 

 296 

 297 

 298 





» 

 tt 



94. Development of egg-mem- 



branes .... 



95. Transverse section 



through germ of Chick . 



96. 97. 

 98. 

 yy. ), ), 



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 Eabbit 



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 



344 

 345 

 351 



352 

 354 

 354 

 354 



