180 Transactions British Mycological Society. 
Form E. Large, light brown spot, not raised nor depressed, 
numerous light brown pycnidia. 
Form F. Same appearance as E but the pycnidia of a some- 
what darker brown. 
Form H. Same appearance as F. 
Form J. Large, brownish spot*rather sunken below the re- 
mainder of the surface, numerous pycnidia varying from brown 
to black. 
Form K. Large, rather watery-looking spot, completely 
covered with pink cushions of spores, later becoming blackish. 
Form K 2. Similar to K, but later the pink cushions (acervuli) 
became black and the appearance was then similar to D. 
Form L. Large canker covered with black pycnidia. 
Form M. Large, rugged, brown canker covered with brown 
pycnidia. ‘ 
Form N. Large canker covered with white mycelium and 
masses of pink Fusarium spores. 
Form P. Large brown cankered spot, rather rugged surface, 
covered with brown pycnidia. 
Form Q. Smooth, black spot, almost shiny surface, numerous 
pycnidia scarcely erumpent through the epidermis of the fruit. 
Form S. Black acervuli formed with typical, pointed setae 
and large numbers of spores. 
Form T. Large spot about 14 inches in diameter, self coloured, 
not soft, no visible pycnidia but very numerous pink tendrils 
of spores projecting through the surface from pycnidia evidently 
subcutaneous. 
Form U. The fungus spread only to a very slight extent 
when inserted into tomato fruits, and no fructifications were 
formed. 
It would make this paper of undue length to include a full 
macroscopic description of these forms on all the different 
media used. For one thing, the composition of such media as 
tomato agar and potato agar varies considerably in different 
batches, and undoubtedly the macroscopic characters of the 
cultures vary with changes in the medium, so that the char- 
acters shown on a medium such as tomato agar or potato agar 
would probably not be of great value to other investigators. 
In the following description, therefore, only the microscopic 
characters on the third modification of Dox’s medium, i.e. the 
one containing 7:5 grms. cane sugar per litre, are given, with 
occasional notes on special points shown on other media, since 
Dox’s medium, being of a synthetic nature, can be duplicated 
at will with the knowledge that future batches will be of very 
close comparative chemical composition with the medium from 
which the present diagnoses were made. 
