726 



SPECIAL HISTOLOGY. 



where it is directly connected with the sheath of the optic nerve, 

 although it is again strengthened, in front, by the expanded tendons of 

 the recti muscles, -with which it is blended, afterwards becoming con- 

 tinuous with the cornea. When boiled, it affords common gelatin, and 

 it consists of true connective tissue, the fibrils of which are very dis- 

 tinctly manifest when the structure is teased out, or transverse sections 



Fig. 296. 



are treated with acetic acid. The bundles themselves are straighter, in 

 other respects as in the tendons, being intimately united and conjoined 

 into larger, thinner or thicker, flattened bands, which are disposed in 



Fig. 20G. — Transverse section tlirough the tunics of tlie eye, in the region of the ciliary pro- 

 cesses, magnified \'2 diameters: Sf/., sclerotica: C, cornea ; Pr. cil., processus cUiaris ; C.a, an- 

 terior chamber; Cjj, posterior chamber; C. v. corpus vitreian ; C.P. cannlis Pctiti ; L,kns: I, 

 iris; a, conjunctiva cornccc, epithelium ; b, liomogeneous lamella beneath, continuous with the 

 conjunctiva sclerotica, x ; c, fibrous layer of the cornea; d, mcmbr. Dernoursii ; e, indication of 

 its epithelium ; /, termination of the mcinbrana Dernoursii, and its transition into peculiar 

 fibres, g, which are continued at i, upon the iris constituting the lig. pectinatum iriclis ; h, 

 canalis Schlemmii ; k, musculus ciliaris s. tensor chorioidew, springing from its inner wall, I; m, 

 pigment layer of the ciliary processes; n, the iris ; o, fibrous layer of the iris; p, indication 

 of its epithelium ; q, anterior wall of the capsule of the lens ; z, posterior wall ; s, indication 

 of the epithelium of the capsule ; t, zomda Zinnii, or anterior thickened portion of the hyaloid 

 membrane ; u, its free anterior lamina (proper zonula), inserted into the border of the lens : 

 V, its posterior lamina blended with the posterior wall of the lenticular capsule; ii', colorless 

 epithelium of the ciliary processes; iv', anterior termination of this ejoithelium. In part 

 after Bowman. 



