131 
granuloma that is commonly found affecting horses in the 
lomon Islands. 
. The following information has also been kindly sup- 
plied: —About 75 per cent. of horses in the Solomon Islands 
suffer from a form of “swamp cancer,” which attacks the 
pasterns only. The tumours vary in shape and size from those 
showing a flat, raised surface with a diameter of about 1 inch 
The 
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paratively dry, but is subject to very heavy dews. e area 
is threaded with tidal lagoons, usually closed at the mouth. 
Horses having no access to swamps or waterholes are commonly 
affected. The animals are never more distant than a mile 
from habitations. ` 
he macroscopic appearance of the tumours is very similar 
to that of habronemic granulomata. The surface is usually 
ulcerated. The tumour is very dense and tough, and on section 
15 seen to contain numerous yellowish, caseo-calcareous nodules, 
not usually larger than a millet seed. e necrotic areas 
are more numerous than seen in tumours occurring in Aus- 
A verti r, with an are 
approximately 10 sg. cm., contained approximately 140 
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infiltrated with eosinophile leucocytes. Many of the necrotic 
ag have been orbed and their place taken by fib 
wue. T s is seen in various stages here is a 
erg terial in the necrotic areas. Larvae showing a c 
Lt longitudinal ridges are seen in various stages of 
“generation, 
It is apparent that the larvae present are not all of the 
ata age. Many appear to be well preserved and of recent 
th ent, while others have completely disappeared, leaving only 
m canals in the necrotic areas. The necrotic areas 
m Various stages of absorption. It appears, therefore, that 
