mMOLOOiCAL STRUCTURES, 



11 



Fig. 1. 



Upper figure human embryo, f*om Ecker. 

 from Bischoff. 



Lower figure that of a dog. 



a. Pore-brain, cerebral hemispheres, 

 etc. 

 6, Mid-brain, corpora quadrigemina. 



c. Hind brain, cerebellum, medulla 

 oblongata, 



d. Eye. 



e. Ear. 



/. First visceral arch. 

 g. Second visceral arch. 

 H. Vertebral columns and muscles 

 in process of development. 



i. Anterior 



K. Posterior s 



L. Tail or os coccyx 



extremities. 



