The numerous publications on developmental cataract, as summarized by Nettleship,1 Harman,2 Groenouw,3 Clausen,4 and Waardenburg,5 have tended to show a uniformity in the type of cataract observed within any family line. Nevertheless, it is sometimes found that certain of the cataractous persons in a given pedigree have a type of opacity of the lens significantly different from that presented by the remaining affected members of the family (Knies,6 Gjersing, 1878, quoted from Harman,2 Nettleship, Harman,8 Groenouw,3 Halbertsma,9 Walsh and Wegman10). This fact has been commented on by various observers, and a question raised from time to time as to the etiologic relationships of the various types. The present paper will de- scribe a genealogy of 123 people, 44 with cataract, which is remarkable for the variety of forms the cataract assumes, and will discuss the question of the genetic