JITJSTELUS LMYIS. 131 



around the hind edge of the rectus inferior it holds that 

 muscle tightly in a short sliarp beiid. From the nerve, at 

 this bend, a small and delicate branch is sent outward to the 

 eyeball, near the point where the ophthalmic branch of the 

 anterior carotid artery pierces it, and was there lost. This 

 nerve would seem to be the ciliaris brevis, which must accord- 

 ingly arise from the ciliary ganglion, and from there run 

 backward along and closely against the oculomotorius to the 

 point where it has its apparent origin from the latter nerve. 



Beyond the branch to the rectus inferior the remaining 

 portion of the oculomotorius, now simply the branch destined 

 to innervate the obliquus inferior, comes into intimate 

 relations both with the ciliary ganglion and the ophthalmic 

 branch of the anterior carotid artery. The nerve here passes 

 ventro-lateral to and closely against the artery. The ciliary 

 ganglion is, in transverse sections that cut through about 

 the middle of its length, a crescent-shaped mass that projects 

 downward from the oculomotorius, the hollow of the crescent 

 directed laterally, and the ventral horn of the crescent 

 curving around the mesial edge of the truncus bnccalis- 

 maxillo-mandibularis. The anterior end of the ganglion lies 

 mesial to the ophthalmic artery at the point where that artery 

 curves downward to join the anterior carotid. The oculomo- 

 torius here lies lateral to the artery, the artery thus here 

 separating the nerve and ganglion. The middle and posterior 

 parts of the ganglion lie mesio-postero-ventral to the artery, 

 and the ganglion is here intimately connected with the 

 oculomotorius. The ganglion lies in the peri-orbital sinus, 

 which the artery and nerve both traverse. 



What the character of the cells of the ciliary ganglion is I 

 could not determine, the several tissues here passing one into 

 the other Avithout distinctly apparent limits. Certain of the 

 ganglion cells are, however, small, while others are large and 

 resemble the ganglion cells of the spino-cranial ganglia. There 

 are thus probably both spinal and sympathetic elements in 

 the ganglion. 



I*[ear the anterior end of the ganglion two delicate branches 



