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PLATE VII 



Figure 1. T 81S. Fibrosarcoma affecting the liver. The neoplasm was probably primary in this site and also metastasized 

 the kidney. Only a few compressed islands of liver cells remain. Magnification X 160. 



Figure 2. T 280. Histiocytic Sarcoma. The varied character of the tumor is portrayed, showing transitions from sheet- 

 e masses of cells to spindle-shaped cells and finally a very loose arrangement of tissue in which are only a few round tumor 

 lis. Magnification X 100. 



Figure 3. T 234. Osteochondrosarcoma. The tumor cells with considerable intercellular collagenlike material surround 

 area of bonelike material developing in a matrix which resembles cartilage. Magnification X 100. 

 Figure 4. T 101. Melanoma. The majority of tumor cells are heavily laden with melanin. Magnification X 500. 



