The separation of the alkaloids on a larger scale points to the presence of at least three alkaloids in Caapi -first, a phenolic alkaloid; second, a non-phenolic alkaloid forming a difficulty soluble hydrochloride ; third, a non-phenolic alkaloid forming a more readily soluble hydrochloride. None of these has been isolated in sufficiently pure form to report on their reactions and properties at this time, except that the non-phenolic alkaloids in solution either in dilute hydrochloric or sulphuric acids exhibit a beautiful blue fluorescence, very similar to that of quinine. These alkaloids form a golden yellow solution in chloroform and readily crystallize on evaporation of this or other solvents. The separation and properties of the alkaloids are under investigation and will be reported in a future paper.