JOURNx\L OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE XV, 



Illustrating Dr. John Denis Macdonald's paper on the 

 Minute Anatomy of some of the Parts concerned in the 

 Function of Accommodation to Distance, with Physio- 

 logical Notes. 



Fig. 

 1. — Vertical section of human cornea. 



a. Epithelium of conjunctiva. 



b. Basement membrane of ditto. 



c. Anterior elastic lamina. 



d. Cornea proper. 



e. Posterior elastic lamina. 

 f. Single pavement of ceils. 



2. — Portion of human cornea seen in face, near the margin of the prepara- 

 tion. 



a. Conjunctival epithelium. 



b. Basement membrane ripped up from — 



c. Anterior elastic lamina. 



d. Cornea proper. 



3. — Vertical section of cornea of the pig. 



a. Conjunctival epithelium. 



b. Basement membrane. 



c. Anterior elastic lamina. 



d. Cornea proper. 



e. Posterior elastic lamina. 

 /. Single pavement of cells. 



4. — Vertical section of cornea of the sheep. 



a. Conjunctival epithelium. 



b. Basement membrane. 



c. More condensed fibrous tissue. 



d. Cornea proper. 



e. Posterior elastic lamina. 

 y. Single pavement of cells. 



