6Y J. M. PETRI fi. 



133 



The Duboisia Uofnvoodii was part of a stock in the possession 

 of Sir Thomas Anderson Stuart, to whose kindness the author 

 is much indebted. After its long journey from the interior, the 

 pituri plant is received in the form of very dry leaf -fragments 

 mixed with broken stalks and twigs. The leaf-portion, con- 

 stituting 50% of the whole, was carefully separated from the 

 sample, and finely powdered for the analysis. 



The Duboisia myoporoides was collected in the National Park 

 by the kind permission of the Trustees. The leaves were taken 

 from trees about 25 feet high and at the time of flowering. 



The Duboisia Leichhardtii F.v.M., is a third vspecies, whose 

 chemical composition is yet unknown. It was collected by the 

 author, near the Stuart River in Queensland, at the same time 

 of year as in the preceding specimen, and while in flower. 



The total alkaloids in each plant were also estimated, and the 

 results are given in the accompanying table. 



The author desires to express his thanks to Sir Thomas 

 Anderson Stuart for laboratory facilities afforded during this 

 investigation. 



Amount of Total Alkaloids. 



REFERENCES TO LITERATURE. 

 Duboisia Hopwoodii. 



1. Mueller — Fragmenta phytographia, (a) Vol. ii., 18(50-1, 138; (b) Vol. 



ix., 1875, 168; (c) Vol. x., 1876-7, 20. 



2. Bancroft — The Pituri Poison. Journ. Queen.sland Phil. Soc, 1872. 

 3. Pituri and Duboisia. Ibid., 1877. 



