T18 
cancer” were kindly supplied by Mr. J. F. McEchran and 
Mr. C. G. Dickinson. 
and soft, while in the older lesions they are larger, darker a 
colour usually, and harder. It is evident that the growth 5 
e tumour depends upon an enlargement of the necro y 
areas and an increased tissue reaction, i.e., the number 0 
necrotic areas does not increase as the tumour grows. 3 
e necrotic areas when separated out from the surrounc- 
e marked irregularities or “branchings. es 
necrotic areas are typical of “swamp cancer” as of the gran 
lomata described above. ; : 
Ulceration of the surface is much more extensive 1n 
cer’ than in the granulomata observed 1n 
de 
. The e Mp 
epitheloid (endothelial) cell reaction with, at times, the fo jut 
ion of many multinucleated cells. Necrotic areas 0c 
or less encapsulated. When ulceration of the surface 18 
lomata ing in Southern Australia. The only vere 
is due to the earlier and more extensive ulceration a 
Secondary infection of the superficial parts of the Hear 
This gives rise to an infiltration of the tissues with neutrop^? l 
leucocytes, which are found mainly in the more superficia 
parts of the lesion, but are not seen attacking the Men 
areas. The tissue reaction is very marked, being greater 
larger the tumour. ce 
The caseous areas have the same microscopic sppe n 
as those already described, but calcification has not bee 
cancer." i 
lesion has been examined, so that ke p 
en possible to demonstrate any larval Nematode. l. 
ces resembling worm canals have been 09S 
