Abstract
Two families are described in which the Ehlers–Danlos syndrome is apparently transmitted as an X-linked recessive character. The results of tests for the Xg blood groups and for colour vision show that the locus for the Ehlers–Danlos syndrome is not close to that for the Xg groups nor very close to the locus for deutan colour-blindness. The clinical features of this variety of the Ehlers–Danlos syndrome include considerable hyperextensibility of the skin and a bruising tendency.