218 



THE ESSENTIALS OF HISTOLOGY 



the suprachoroidea in structure, but contains the blood-vessels of the 

 coat. In its outer part are the larger vessels (arteries and veins], the 

 veins having a peculiar vorticose arrangement ; in its inner part 

 (chorio-capillaris) are the capillaries, which form an extremely close 

 network with elongated meshes, the capillaries radiating from the 



FIG. 253. SECTION (FROM THK I.VK OF A MAN, AGED 30), SHOWING THE 

 RELATIONS OF THK OiUNKA, S( 'LEROTir, AND IRIS, TOGETHER WITH THE 



OI.JAKV MTSl LIC, AND THK < AVi:l;NolS STAC !:>, NEAR THE ANGLE OF THE 



ANTERIOR CIIA.MUEI:. (Magnified.) 



A, epithelium ; B, conjunctiva! mucous membrane ; c, sclerotic ; D, membrana suprachoroidea; 

 i., opposite the ciliary inn-He ; v, clioroid, with ciliary processes ; G, tapetum nigrum and 

 pars ciliaris retinee ; u, cornea (snbstantia propria) ; J, iris; K, radiating and meridional, 

 and L, circular or annular bundle- of the ciliary muscle ; M, Imudles passing to the 

 sclerotic; N, ligamentum peetinatum iridis at the angle. ". of the anterior chamber; 

 I', line of attaelmn nt ..I tin- iris. 1, anterior lion in -/en eons lamina of the cornea ; 2, posterior 

 homogeneous lamina, covered with epithelial ceils \\iiich are continued over the front of 

 the iris ; 3, cavernous spaces at the angle of the anterior chamber (spaces of Fontana) ; 

 4, canal of Schlemm, with epithelial lining, and with a vessel, 5, leading from it; 6, other 

 vessels;/, bundles of fibres of the sclerotic having a eirenlar direction, cut across; 

 8, larger ones in the substance of the sclerotic ; 9, tine bundles cut across, at limit of 

 cornea; 10, point of origin of meridional bundles of ciliary muscle; 11, blood-vessels in 

 sclerotic and conjunctiva, cut across ; 12, section of one of the ciliary arteries. 



extremities of the small arteries and veins in a highly characteristic 

 manner (fig. 252). In the ciliary processes the vessels have for the 

 most part a longitudinal direction, but there are numerous convoluted 

 transversely disposed capillaries uniting the longitudinal vessels (fig. 255). 



