PLATE VIL 



A. REPRESENTS the eye of the horse, in which the 



pupil is dilated, being in an obscure light. 



B. represents the pupil contracted by the stimtrius of 



a strong light. 



C. shews the membrana nictitans, or haw, brought 



half way over the eye. 



D. shows the white specks in the pupil, occasioned by 



a partial opacity of the crystalUne lens, or 

 an incipient cataract. 



