192 MR. TOYNBEE ON THE NON-VASCULAR ANIMAL TISSUES. 



Fig. 3. A highly magnified view of the blood-vessels in the membrana sclerotica 

 at the circumference of the cornea. 



A. The cornea. 



B. The membrana sclerotica. 



Fig. 4. A plexus of blood-vessels situated on the surface of the circumference of 

 the cornea, between the latter and the membrana conjunctiva. 



Fig. 5. A plexus of vessels similarly situated to that of fig. 4. 



Fig. 6. Displays the manner in which the blood-vessels that ramify on the posterior 

 part of the capsule of the crystalline lens are disposed at the circum- 

 ference of the anterior surface of the capsule. From a human foetus of 

 between four and five months. 



A. The anterior surface of the capsule of the crystalline lens. 



B. Blood-vessels situated on the anterior surface of the capsule at its 

 circumference. 



[In the above Plates, the arteries, dilatations and veins, are distinguished from 

 each other by the difference in the mode of engraving.] 



