CANCEKOUS TUMORS. 



17 



growth are so similar in their microscopical appearances to 

 those obtained from the last, that it might be supposed they 

 were taken from the same specimen. In parts of some of 

 them, however, the terminal and growing extremities of the 

 slender cancer cjdinders are so fairly shown, that I have 

 selected a portion of one of the sections for a couple of 2>ho- 

 tographs. 



In the place in question the small cells in the connective 



Fig.l. 



Section of an epithelial cancer of the arm, showing the terminal buds of 



the cancer cylinders. From photo-micrograph No. 19. 



Magnified IIG diameters. 



tissue, into which the cylinders are sprouting, arc particularly 

 abundant about the terminal buds. The cylinders themselves 

 are very slender, appearing in section as merely a double row 

 of somewhat quadrangular cells. The upper portion of the 

 first photograph represents the rete-malpighii of the skin, so 

 that the space between the upper parts of the cylinders repre- 

 sents, in fact, skin papilUe greatly swollen transversely. I 

 32 



