360 



THE ANIMALS AND MAN 



ently one on either side of the medulla oblongata. The two 

 lobes of the cerebellum are connected by a mass of nerve 

 fibers called the pons varolii (fig. 179 A). The medulla ob- 

 longata (fig. 179 A, mo) is continued ventrally into the spinal 

 cord. 



Fig. 180. General plan of branches of trigeminal or fifth nerve. 1, 

 small root of Sth nerve; 2, large root; 3, placed on bone above opthal- 

 mic nerve, (with frontal, lachrymal and nasal branches); 4, superior 

 maxillary division; S, inferior maxillary division; 6, chordi tympani; 

 7, facial; A, lachrymal gland; B, lower jaw; C, sub-lingual gland; D, 

 submaxillary gland. (After a sketch by Charles Bell.) 



The cranial nerves. — The twelve cranial nerves arise 

 from the under side of the brain (fig. 179 B, I to XII). 



(i) The olfactory nerves arise from the anterior end of 

 the olfactory lobes. These pass to the nasal passages and 

 are the nerves of smell, 



