448 
Notes. 
It seems most probable that the laticiferous tubes are related 
functionally, as well as anatomically, to the secretory sacs of other 
plants. The exact distribution of the branches is, I think, largely 
determined by their following the line of least resistance during their 
sliding growth between the surrounding elements. 
All necessary references to the literature of the subject will be 
found in Mr. Groom’s paper. 
D. H. SCOTT, South Kensington. 
