980 



MR. J. H. LLOYD AND MISS EDITH SHEPPARD ON 



olfactory lobe. It runs attached to tlie posterior border of the 

 laterally elongated olfactory sac, which is placed in the laterally 

 expanded olfactory capsule. The portion of the nerve adherent 

 to the sac is called the olfactory bulb by Busch (2), whose figure 

 shows it expanded rather more than is the case in our specimen. 

 To verify Busch's statement we have sectioned a portion of the 

 nerve taken from the region of the sac, but we have failed to find 

 any trace of nerve cells. This, however, may be accounted for 

 by the fact that our material wa.s not in the best state of pre- 

 servation. 



Text-figure 7. 

 o.l. 



J3-/. 



c. cerebellum. 

 f.h. prosencephalon. 

 l.t. lobi trigemini. 

 m. medulla oblongata. 



Dorsal View of Brain. 



I o.l. olfactory lobes. 



I r.h. restiform bodies, 



V. 4th ventricle. 

 1 I, III, V. cranial nerves. 



The optic nerve, runs on the ventral side of the hammer just 

 anterior to the auditory process. 



The Oculoonotor nerve runs for the greater portion of its length 

 posterior to the optic, but crosses it ventrally about an inch from 

 the orbit and is distributed to the inferior oblique, anterior 

 rectus, and inferior rectus muscles. A distinct branch of the 

 nerve runs parallel to the main branch and supplies the superior 

 rectus muscle. 



The jsa^Ae^zc 7? e?"ve runs antero- dorsal to the optic and supplies 

 the superior oblique muscle. 



The ophthalmic branches of the fifth and seventh nerves run 

 directly to the anterior end of the dorsal surface of the snout. 

 The fifth, in addition, sends off a lateral branch to a patch of 

 ampullary cinals just mesial of the orbit. 



The mandibular and tnaxillary branches of the trigeminal have 

 the normal distribution. 



The abducens runs ventral to the auditory process and supplies 

 the posterior rectus muscle. 



