The bulbs of Brunsvigia rosea (Lam.) Hannibal (alternative name, Amaryllis belladonna L.) have been found to contain three new alkaloids of the Amaryllidaceae which have been named acetylcaranine, ambelline and caranine. Acetylcaranine and caranine also were isolated from the bulbs of Ammocharis coranica (Ker-Gawl.) Herb. A fourth new alkaloid designated as crinine was found in trace amounts in the two Crinum species studied. Lycorine was present in all bulbs tested. A sixth alkaloid, C17H19NO4, m.p. 198-199°, isolated from Ammocharis coranica and the Crinum species, possessed physical and chemical properties which agree with those reported for crinamine. The molecular formulas and functional groups of acetylcaranine, ambelline, caranine, crinamine and crinine have been determined. © 1955, American Chemical Society. All rights reserved.