muscle, having thin and stretched tissues over them. The 

 brisket seems to be by far the commonest situation for 

 these tumours, and those more deeply embedded or of small 

 size which are not visible to the eye during such inspection, 

 may be often felt by running the hand over the surface 

 with moderate pressure, when they feel like marbles in the 

 underlying tissues. An incision into the healthy structure 

 stretched over them at once enables the nodule to be 

 enucleated with more or less ease. When thus removed, 

 they are of a pale yellowish tint like fibrous tissue and 

 vary in size from that of a small marble to tumours two 

 inches or more in diameter. They vary in shape from more 

 or less spherical in small growths to flattened ovals in the 

 largest and are often of irregular contour shewing bosses 

 and projections. The flattening and the irregularities of 

 surface are probably all due to the resistance of the sur- 

 rounding tissues, with consequent extension of the growth 

 along the lines of least resistance. 



On section of each nodule and towards its centre will 

 be found the worm or worms in an intricately coiled mass, 

 embedded in a comparatively loose but resistant fibrous 

 stroma, with a varying quantity of serous or sero-sanguin- 

 olent fluid. This fibrous tissue is tunnelled by canals 

 occupied by the parasite. The central worm mass proper 

 varies very little in size in comparison with that of the 

 whole worm-tumour ; in other words, that found in the 

 largest mass is little, if at all, larger than that found in a 

 growth the size of a marble. This area occupied by the 

 worm itself is completely enclosed in a delicate fibrous 

 capsule which can be shelled entirely out of the dense, 

 fibrous tissue forming the external coverings, leaving in 

 the latter a cavity with slightly irregular walls. The outer 

 covering consists of layers of very dense whitish fibrous 

 tissue much firmer than that between the coils of the worm 



