During a period of eight years in the New York state hospitals, when the present classification was not adhered to absolutely, 4,724 senile psychoses were divided into types as follows:—Simple deterioration, 52.01 per cent; presbyophrenia, 5.75 per cent; delirious and confused states, 12.99 per cent; depressed and agitated forms, 8.25 per cent; and paranoid varieties, 16.23 per cent. During the same period less than one per cent of presenile psychoses were reported. Since the Association's classification has been in use the same institutions show the following distribution of 1,351 senile psychoses during 1918 and 1919:—Simple deterioration, 56.24 per cent; presbyophrenia, 4.14 per cent; delirious and confused states, 13.53 per cent; depressed and agitated forms, 18.65 per cent; and paranoid varieties and presenile forms, less than one per cent. The senile psychoses in the Massachusetts hospitals during 1919 were divided as follows:—Simple deterioration, 56.94 per cent; presbyophrenia, 7.79 per cent; delirious and confused states, 7.45 per cent; depressed and agitated forms, 7.11 per cent; paranoid conditions, 18.64 per cent; and presenile forms, 2.03 per cent. In nineteen hospitals in other states 1,823 cases were classified as follows:—Simple deterioration, 64.39 per cent; presbyophrenia, 11.62 per cent; delirious and confused states, 9.59 per cent; depressed and agitated forms, 4.71 per cent; paranoid conditions, 6.91 per cent; and presenile forms, .27 per cent. The total of 6,842 cases referred to above were, therefore, distributed as to type as follows: _Type_ _Per Cent_ Simple deterioration 55.52 Presbyophrenia 7.40 Delirious and confused states 11.83 Depressed and agitated forms 7.26 Paranoid conditions 13.85 Four hundred and nineteen cases reported by the Ohio state hospitals in 1920 and not included in the above summary were shown as follows:— _Type_ _Per Cent_ Simple deterioration 49.88 Presbyophrenic types 6.20 Delirious and confused forms 18.61 Depressed and agitated conditions 7.39 Paranoid states 15.75 Presenile types 2.14 These constituted in all 14.4 per cent of the 2,895 first admissions during the year, a much higher rate than that shown in other states. In analyzing these findings it should be borne in mind that the American classifications do not take into consideration presenile conditions as such, they being all reported with the senile psychoses, with the exception of involutional melancholia, which is, of course, shown separately.