17.sT.17. OAV.J.V. 359 



chorioidea, the ciliary body, and the iris, there arc other veins, 

 the rent? ril'ian* pO&ti&B breves (I.) and the /v mr r/7/^/vx <mtic(X, 

 which take a course more or less parallel to that of the arteries. 

 The ir/nr r ///<// vx a/ttictt' (n) drain the blood from the ciliary 

 muscle and from the veins of the annular canal of Schlemm (S). 

 They take the blood also from the episcleral connective tissue 

 u/.) (except some which Hows into the vena? vorticosse), from 

 the conjunctiva sclent? (/'. ) and from the edge of the cornea (/,). 



(8) The Lymph Path* <>f the 



The eyeball contains no true lymph-vessels. hut a system 

 of spaces which, according to Schwalbe, may be divided into 

 the aiita'lor and the posterior lymph path*. 



The system of anterior lymph paths forms: 



1. The lymph canals of the cornea and sclera ; 



2. The anterior chamber of the eye, which is tilled with the 

 aqueous humor. "With this there communicates by means of a 

 capillary space between the iris and lens: 



:>. The posterior chamber of the eye. With this in turn 

 there are connected : 



4. The spatia zonularia (canal of Petit). 



The system of posterior lymph paths consists of: 



1. The subdural and snbarachnoideal spaces, separating the 

 sheaths of the optic nerve ; 



The perichorioideal space between the chorioidea and the 

 sclera ; 



3. The Tenon's lymph space, which is found between the 

 durai sheath of the optic nerve and the sclera, and between the 

 fibres of the fascia of Tenon ; and, finally, 



4. The lymph spaces of the retina. These appear as peri- 

 vascular spaces, and as interlaminar spaces between the pig- 

 ment layer and the rest of the retina. 



The perichorioideal space is connected, by means of the 

 -pace.- surrounding the verne, vorticosti', with the lymph space 

 of Tenon. 



