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Fig. 13. — Section through Eye of Acilius larva, showing the Natural 

 Appearance with the Pigment in situ on the left, and the Retinal Cells 

 as seen in a Specimen which has been bleached on the right. (After 

 Gaskell.) 



ct. : cuticle. p. : pigment. 



gl. : cerebral ganglion. p.r.c. : pre-retinal cells. 



hyp. : hypodermis. rh. : rods. 



/. : lens. ret. c. : retinal cells. 



n. : optic nerve. v. I. : vitreous layer. 



Compare with Fig. 14. 



