Chap. I. 
EMBRYONIC DEVELOPMENT. 
15 
Fig. 1. Upper figure human embryo, from Ecker. Lower figure that of a dog, 
from Bischoff. 
a. Fore-brain, cerebral hemispheres, &c. 
b. Mid-brain, corpora quadrigemina. 
c. Hind-brain, cerebellum, medulla ob- 
longata. 
d. Eye. 
t. Ear. 
/. First visceral arch. 
g. Second visceral arch. 
H. Vertebral columns and muscles in 
process of development. 
i. Anterior 1 
K. Posterior 1 extremities. 
L. Tail or os coccyx. 
