238 ZOOLOGY FOR MEDICAL STUDENTS chap. 



convex outwards and, it may be, inwards as well. The cuticle is thus 



/ 



I 1 1 i i 



Fig. 106. 

 Illustrating the structxire of the simple (A) and radiate (B) types of eye of the Arthropoda. 

 c, Cuticle : c.o, crystalline cone ; ep, epidermis ; /, lens ; «./, nerve fibre ; p, pigment-cell ; R, retinal 

 cell ; r, rod ; v, vitreous cell. 



divided up into numerous little lenses the function of which apparently 



