PLATE 1 
EXPLANATION OF FIGURES 
Various types of the defective eyes described in the text compared with a 
pair of normal eyes (1). The numerals refer to the pedigree number of the 
individual in our recores and in the chart shown in text figure 5. The eyes are 
drawn approximately to scale; those of the 10A series are from individual which 
were not yet mature. The bluish or silvery cast of many of the abnormal eyes 
is not due to pigment, but to opacity of the lens, coupled in some instances, 
probably, with deficiency of the retinal blood-vessels. 
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