10 



The Descent of Man. 



Part L 



Fig 



1 Upper figure hmnan embryo, from Fcker. Lower figure that of a dog, 

 vv from Bischoff. 



a Fore-brain, cerebral hemispheres, &c. 

 b Mid-brain, corpora quadrigermna. 



c. Hind-brain, cereb Hum, medulla ob- 

 longata. 



d. Kye. 



e. Ear. 



f First visceral arch. 



a. Second visceral arch. 

 H. Vertebral columns and muscle 

 process of development. 



i Anterior 7 extr cmities. 

 K. Posterior ( 

 L. Tail or os coccyx. 



