jF\ Cavers. 
2. The disease chiefly affects the collar and root system of 
old rubber trees, though a few five-year-old trees have been attacked 
by it. 
3. The fructifications of the fungus are greyish brown or 
blackish plates which are formed at the collar or on exposed lateral 
roots of diseased trees. 
4. The fungus probably often begins to grow on decaying 
stumps though in several trees it has been found to follow attacks 
of white ants. 
5. It is important that the disease should be dealt with in the 
early stages by cutting out and destroying all discoloured tissues. 
REFERENCES. 
1. Brooks, F. T., and Sharpies, A. “Pink Disease.” Bulletin 21, Dept, of 
Agric., Federated Malay States. 
2. Delacroix, G., and Maublanc, A. “Maladies des plantes cultivees dans 
les pays chauds.” Paris, 1909, p. 440. 
3. Leveille, M. J. H. “ Champignons exotiques.” Ann. des Sci. Nat., Bot., 
1845, p. 48. 
4. Petch, T. “ Root Diseases of Tea.” Circ. Roy. Bot. Gard. Ceylon, 
Vol. 5, No. 2, 1910. 
5. ,, “The Physiology and Diseases of Hevea brasiliensis.” London, 
1911. p. 159. 
6. ,, “ The Fungus Diseases of Hevea brasiliensis." Rubber-recueil, 
International Rubber Congress, Batavia, 1914. 
7. Saccardo, F. A. “ Sylloge Fungorum.” I, p. 352. 
THE INTER-RELATIONSHIPS OF PROTISTA AND 
PRIMITIVE FUNGI. 
By F. Cavers. 
(Continued from p. 104). 
IV.—Relationships of Colourless Flagellata to Infusoria. 
A S classified by Ehrenberg the Infusoria included Desmids, 
Diatoms, Bacteria, Sarcodina (excluding Foraminifera and 
Radiolaria) and Rotifers, as well as Flagellates and Infusoria as now 
recognised. Siebold (1845) narrowed the term to its present limits, 
except for the admission of some Flagellate families, and Butschli 
limited the group by removing these families—Dinoflagellata 
(Peridiniales) and Cystoflagellata (Noctilucales)—to his Masti- 
gophora (Flagellata). As now defined, the Infusoria are Protozoa 
in which the body is bounded by a permanent plasmatic pellicle and 
is therefore of definite form, never using pseudopodia for locomotion 
or ingestion; provided, at least in the young state, with numerous 
cilia or organs derived from cilia; and equipped with a double nuclear 
apparatus, as already stated. 
