MILLER — CONTRIBUTIONS FROM ANATOMICAL LABORATORY 213 



branch to the lip. The second branch, the External Inferior 

 Maxillary, E. I. M., PL 9, runs along the anterior side of the 

 pterygoid and is distributed to the outer surface of the ramus 

 of the lower jaw. A third branch, the Orbito-Nasal, O. K, 

 PI. 9, runs along the lower border of the temporal muscle be- 

 tween it and the masseter muscle; passing around the dorso- 

 median side of the eye it gives off branches to the muscles of the 

 orbit, and then goes to the nasal fossa, where it divides into two 

 branches, one on each side. Two small branches pass to the 

 temporal muscle. Another branch of considerable size is the 

 Ophthalmic, Oph., PI. 9, which arises in common with the 

 other branches of the internal carotid and runs nearly parallel 

 with its distal part to be distributed to the eye. Sometimes the 

 ophthalmic sends branches to the nasal capsule. 



Just as the internal carotid pierces the parasphenoid it gives 

 off a branch at nearly a right angle, the Cerebral Carotid, 

 C. C, PL 9, which passes to the ventral side of the brain where 

 it divides into an anterior and a posterior branch. The anterior 

 continues along the ventral surface of the cerebral hemisphere 

 of the same side, ending in a. number of fine branches. The pos- 

 terior branch runs diagonally candad and unites with its fellow 

 from the other side to form the Basilar Artery, Bs., PL 9, and 

 then runs along the ventral side of the medulla, giving off 

 branches at right angles to its course. The two largest of these, 

 Au., PL 9, pass one on either side to the ear. 



The Vertebral Artery, Vert., PL 9, arises from the root 

 of the aorta, runs cephalad to the parasphenoid, where it divides 

 into two branches, one running towards the median plane, the 

 other away from the median plane. The latter again divides 

 into three small branches, a posterior and a lateral branch going 

 to the roof of the mouth and an anterior branch to the side of 

 the medulla. The former branch runs along the spinal column 

 dorsal to the lateral processes. 



The Pulmonary Artery, P., PL 9, and fig. 1, PL 10, arises 

 from the third efferent branchial artery between the point where 

 the second efferent artery joins it and where the anastomosing 

 branch from the first efferent enters. It gives off a few small 



