ARTERIES OF THE CHOROID AND IRIS. 



321 



and its immediate neighbourhood. The latter are usually of 

 smaller calibre. Some give off the branches already mentioned 

 to the optic-nerve entrance. 



Fig. 368. 



Fig. 368. Semi-diagrammatic representation of the choroidal ves- 

 sels. A t Chorioidea ; B, pars non-plicata of the ciliary body, orbiculus 

 ciliaris ; C, ciliary processes (the ciliary muscle is supposed to have 

 been removed) ; D, ciliary muscle ; E, iris ; a, arteries ciliaris 

 posteriores breves ; 6, arteria ciliaris posterior longa ; c, arteria? 

 ciliares anteriores ; c p venae ciliares anteriores ; h, vense vorticosse ; 

 o, arterise recurrentis choroidese ; p, circulus arteriosus iridis major. 



2. The long posterior ciliary arteries (arterice ciliares pos- 

 teriores longce, 6,) have the same origin as the short. They 

 are two in number, and perforate the sclerotic in the horizontal 

 meridian of the eye, somewhat more anteriorly than the latter, 



Y 



