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56 Examination of an Alhinotic Eye 
DESCRIPTION OF PLATES. 
PLATE I. 
Fig. 1. Section through choroid and' retinal pigment layer of a dark-race foetus, age 5—6 months. 
X 600 X S . Shows branched cells with pigment granules. 
Fig. 2. Section through choroid and retinal pigment layer of a seven-months' Tamil foetus, x 600 x 6. 
Shows pigmented chromatophores. 
Fig. 3. Section of iris from full-time Tamil foetus, x 125 x ^. 
Fig. 4. Section of iris from adult Tamil, age 27. x 12.5 x ^~ . 
Fig. 5. Section through choroid and retinal pigment layer of adult Tamil, age 27. x 600 x ^. (Compare 
with Figs. 1 and 2.) 
PLATE II. 
Fig. A. Section of iris from British female albino, age 17. x 105 x 5 . Nuclei of some epiblastic pigment 
cells are visible. 
Fig. B. Section of a normal British iris, x 105 x 
Fig. C. Section of iris from British male albino, age 67. x 105 x 5 . Brown pigment is present in both ■ 
layers of the epithelium on the back of the iris. 
Fig. D. Section of iiis from British male albino, age 74. x 330 x&. A bit of iris was removed at an 
extraction of cataract. Pigment is present in the cells of both epithelial layers on the back of 
the iris. 
Fig. E. Section of iris from Negro albino, x 105 x f . (Coat's case.) Shows pigmented chromatophores 
as well as brown pigment in posterior epithelial layers. 
Fig. F. Section of iris of a remarkably perfect British male albino, age 74. Portion of iris removed 
during the operation for extraction of cataract. (Nettleship's case.) Iris is pigmentless. 
The original drawings were reduced 7 ; 6 for the plate reproduction. 
