EYE OF THE ENGLISH SPARROW 



377 



nerve. In its course it divides into a number of branches which 

 will be described in more detail. 



Fig. 15 Posterior view of the right eye of the sparrow, showing the arteries 

 to the eye and its accessory parts. C and c, ciliary arteries; F, frontal branch of 

 ophthalmic artery; NOp, optic nerve; 06 i, inferior oblique muscle; Ob s, superior 

 oblique muscle; Hg, Harder's gland; Ic, long ciliary artery; N, nasal branch of 

 ophthalmic artery; 01, infra-orbital; OS, supra-orbital; OpE, external oph- 

 thalmic; Op I, internal ophthalmic; Op T, ophthalmotemporal branch; p, artery 

 to pecten; Pinf, inferior palpebral muscle; qn, quadratus muscle; Py, pyra- 

 midalis; R ex, external rectus; R inf, inferior rectus; R int, internal rectus; Rs, 

 superior rectus. X 10. 



Soon after turning inward the ophthalmotemporal artery gives 

 off some small branches which penetrate the sclerotic to supply 

 the chorioid and ciliary muscles (c). It then sends off another 



