10 



The Descent of Man. 



Part I. 



T\%. i. Upper figure human embryo, from Fcker. Lower figure that of a dog, 

 from Bischtiff. 



a. Fore-brain, cer'-hr.Tl hprnipphercs, &c. 

 ft. Mid-bruin, coip'ira quailripremlna. 



c. Hind-b aiii, cereb Hum, medulla ob- 

 longata. 



d. l-ye. 



e. Eiir. 



f. First vitowral aicb. 



.(7. Second visceral arch. 

 H. Vertebral columns and musclefc 

 process of develoj)ment. 

 I Anterior ) . ... 

 K. Posterior X extremities. 

 L. Tail or os cocyx. 



