690 PROCEEDINGS OF SECTION I. 



Cancer oj the Breast in a Lioness (10 years). — Malignant growth in 

 udder and sublumbar glands, &c. Numerous secondary deposits in 

 lungs, liver, and spleen. Also growths on pleural surface of one rib, 

 in omentum, and probably in kidney. 



Malignant Growth of Suprarenal Gland in Sheep. — The suprarenal 

 was much enlarged, and the growth extended below into the right 

 kidney and above into the liver. The liver and lungs were occupied 

 by numerous large secondary deposits. 



Malignant Tumor of Mediastinum in Bullo'-'k, forming a Cap to the 

 Heart. — This very large growth was formed of masses of large cells in 

 alocote. 



Single Tumors. 



Chordroma of Rib in Sheep. — A large cartilaginous tumor the size 

 of the fist. 



Melanotic fibromata. — These were found sometimes in cattle in 

 various subcutaneous parts. 



MELANOTIC PIGMENTATIONS. 



A very interesting series of melanotic pigmentations has been met 

 with both in cattle and sheep. Macroscopically and microscopically 

 the pigment looks like melanin, and it answers to the rough chemical 

 tests for this substance. Its origin is shrouded in obscurity. One case 

 suggests the cortex of the suprarenal as being the producer, while others 

 are generally attributed to the nature of the food. 



Melanotic Livers of Sheep {Saltbush Liver). — These are of frequent 

 occurrence in the livers of eastern sheep. The organ is a deep bluish- 

 black, and in sections the lobules are mapped out. The portal glands 

 are similarly pigmented. Microscopically there is a deposit of melanin 

 granules in the liver cells and in the lymphoid tissue. The organs are 

 called " saltbush livers," from the idea that feeding on this shrub 

 causes the pigmentation. 



Melanotic Deposit in Kidney of Sheep. — A dark black pigmentation 

 is seen in the cortex. Microscopically the basement membrane of some 

 of the tubules is occupied by a black pigmented material. 



Intense Melanotic Pigmentation of Suprarenal and Connectke 

 Tissues of Bullock. — This case is very interesting. The cortex of the 

 suprarenal is somewhat enlarged, and jet-black. There is a dense 

 accumulation of melanin granules between the cells. The medulla 

 :seems free. In addition to this, there are several large wedge-shaped 

 :areas of melanotic pigmentation with granules in the lungs, extensive 

 blue-black pigmentation of the connective tissues round the aorta, and 

 a similar coloration of the dura and pia-mater of the spinal cord, and 

 part of the brain. Another similar, but less marked case, has also been 

 met with. 



Melanotic Pigmentation of Lung of Bullock. — In another animal 

 similar wedge-shaped black areas were found in the lungs. 



