LIST OF WOODCUTS. 



FIGURE PAGE 



116, 117. Head of embryo 



Chick . . . .356 



118. Head of embryo Dog . 356 



119. Rudiments of the limbs . 357 



120. 359 



121. Lyre-shaped germ of Dog 367 



122. Human germs from the 



second to the fifteenth 

 week . . . .368 

 123, 124. Anatomy of human 

 germs (four and five 

 weeks) . . . .370 



125. Head of Nose -ape . . 374 



126. Head of Julia Pastrana . 374 

 127-131. Human eggs and 



germs from second to 



sixteenth weeks . . 376 



132,133. 377 



131. 378 



135. Chick germ with allantois 380 



136. Dog germ with allantois . 381 



137. 382 



138. Pregnant human, uterus 



with egg - membranes 

 and navel-cord . 384 



139. Development of egg-mem- 



branes .... 385 



140. Development of amnion . 387 



141. 388 



142. 389 

 143,144. Development of heart 392 

 145, 146. 393 



147. 395 



148. First circulation of the 



blood . 



396 

 397 



398 

 420 



150. 



151. Amphioxus lanceolatus 



152. Transverse section 



through Amphioxns . 424 



153. An Ascidian . . .431 



154. Another Ascidian . . 434 



155. Gastrula of Amphioxus . 444 



156. Gastrula of Sponge . 445 



157. Transverse section 



through Amphioxus larva 417 

 158-160. 452 



161. Transverse section 



through Vertebrate . 457 



162. Appendicularia . . 459 



