Cinchona alkaloids of the cinchonicine and quinicine type, reduced with palladium and hydrogen, yield mixtures of stereoisomers of a new type of alkaloids which we have called dihydrochonicinols and dihydroquinicinols. In general the d- forms proved easier to isolate. A number of the d- bases, one of the l- bases, and numerous salts of the d- and l- forms are described. © 1922, American Chemical Society. All rights reserved.