DISEASES OF THE OX AND SHEEP. * 275 



the oogonium. There also grow from the cell thin filaments 

 termed antheridiay which pass towards the oogonium with the 

 material of which they merge. The oogonium then develops 

 into a numher of spores which escape and form moulds 

 again. 



The actinomyces which we have already described, when 

 magnified seven hundred diameters, is seen from the accom- 

 panying figure to be arranged in a radiate manner around a 

 central homogeneous mass and is relegated to the Ustilaginese. 



We propose, after these preliminary remarks, to consider the 

 symptoms caused by the growth of the fungus actinomyces. 

 The usual seat of the tumours caused by the actinomyces is 

 some part of the mouth, in most instances the tongue being 



Fig. 35. — Tuft of Actinomyces, Highly Magnified. 



the organ only or specially invaded. When in the tongue, the 

 growths are noticed to vary in size from that of a tiny spot to 

 that of a small orange. As a rule they grow rapidly, and may 

 speedily invade the greater part of the tongue, and even the 

 neighbouring parts. When the tongue is examined, one finds 

 the elevated portions or prominences in greater or less abundance 

 on the upper surface or on one or both sides of the organ. 

 Sometimes they are found covering the entire surface. In 

 appearance they look like excrescences flattened on the surface, 

 or, if they have been in existence some time, they may appear as 

 irregular ulcers, the inflammatory product caused by the growth 

 of the fungus having broken up. Such excrescences or ulcers 

 may be found singly or in little groups. The tongue itself is 

 enlarged and hardened, and may be ulcerated in one or many 



18 * 



