Biometrika, Vol. VII, Part III 
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Fig. 1. Section of eye in 4tli week embryo (10 uim. long). 
((() Pigment granules in pigment layer of retina. 
(b) Lens. 
[Dr Low's section] 
Fig. 2. Section of eye, 10th week foetn.s (28 mm. long). 
(a) Pigment layer of retina. 
[Dr Low's section] 
