106 J. A. Gilruth: 



and showed a small ulcerating surface just under the jo'int. 

 Below this swelling was a caseous and necrotic area, extending^ 

 downwards about two inches, and surrounded w^ith chronic in- 

 flammatory tissue. Smears from this showed numerous spiro- 

 chaetes and a mixed bacterial flora. 



Attempts to transfer the condition by inoculation on scarified 

 skin resulted in a number of granulomatous, inflammatory^ 

 chancroicJ lesions being slowly developed at and in the vicinity 

 of the scarified area. These ultimately disa^jpeared, but at no 

 time were spirochaetes detected, although microscopical ex- 

 aminations were frequently made : the granulomatous tissue 

 appeared to be due simply to streptococci, Avhich were present in 

 large numbers. 



The contact pig remained normal. 



Recently I have had an opportunity of examining two cases 

 of scrotal tumours similar to those described by Dr. Cleland, 

 through the courtesy of Mr. John Robertson, Director of the 

 City Abattoir. Both pigs were in fat condition, about 18 months 

 old, and I was informed the viscera of each were normal. At 

 first glance the tumours had almost the appearance of normal 

 testicles somewhat enlai'ged, being very prominently situated in 

 the scrotal region subcutaneously. The skin was normal, but 

 for the scar where the wounds by the castration knife had been 

 made. In one case a tumour was situated in each scrotal sac, 

 but in the other only one was present. On dissection the 

 tumours, which were ovoid, slightly flattened and of the diameter 

 of a large orange, were found to be circumscribed and 

 fairly dense in consistency. On section the new growths were 

 seen to be composed of fibrous but oedematous. new connective 

 tissue, enclosing a central, irregular, necrotic, caseous area 

 almost the size of a walnut, immediately around which the 

 fibrous tissue was distinctly of a greyish dirty colour, strongly 

 contrasting with the translucent homogeneous appearance of the 

 peripheral mass. 



In each case the spermatic cords, at the distal end of which 

 the tumours proper were situated, were thickened, being about 

 an inch in diameter, and contained several circumscribed 

 caseous areas varying from the size of a marble to that of a 

 walnut. 



