1. Dr. Penrose, to whom I am much indebted for several valuable observations on the subject matter of this paper, suggests that in order to emphasize the normal character of the variations manifested by the subcultural group they should be referred to as physiological variations. The only objection—and it is not one of vital importance—is that physiology deals with functions, whereas the kinship of the subcultural to the normal is primarily in respect of endowments. The term “subnormal” indicates most appropriately the status of this group, but unfortunately this term is usually applied to all cases with mental capacities below normal.