EYE OF THE ENGLISH SPARROW 



393 



The infra-orbital branch of the superior maxillary nerve, 

 after sending off some small branches to the lacrimal gland, 

 divide* into two parts. The superior division, the lacrimal 

 nerve, {1} , is directed supward and forward along the anterior and 

 lower margin of the lacrimal gland just beneath the skin. It 

 sends some small nerves to the gland and then divides near the 

 posterior canthus into two branches. The superior supplies the 

 upper lid; the inferior, after sending branches to the lower lid, 



Fig. 27 Enlarged view of the right eye of sparrow, showing the distribution 

 of the nerves over the front of the eye, the skin, with the exception of the margin 

 of the lids, liaving been removed, g, lacrimal gland; im, inferior maxillary nerve ; 

 10, inferior orbital nerve; I, lacrimal nerve; sm, superior maxillary nerve; so, 

 superior orbital nerve. 



turns downward and joins the infra-orbital near the anterior 

 portion of the eye. 



The infra-orbital, after giving off the lacrimal branch, runs 

 forward over the ventral surface of the eye near the margin of 

 the orbit, near the anterior part of which it divides. The upper 

 branch is joined by a part of the lacrimal nerve as stated above. 

 These two divisions of the infra-orbital soon leave the orbit and 

 are distributed over the skin and upper mandible. 



