This study was undertaken, in the absence of published data, for personal considerations of curiosity and Flg. 1.-Case 1: The eplphysts of the ulnn Is undeveloped. The semilunar is likewise undeveloped. The wrist Is below Hint which Is normal at the age ol (>% years': Actual age of partent, 7 years 1 month Flg. 2.-Case 3 : The development of bones In Ihe wrist Is equivalent In that Ol the nge ol 8% years. Actual age of patient, 6 years It) monihs. There are no e'plphyses o£ the ulna and no

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... oid. interest, since each one of the patients has been attended