DESCRIPTION OF FIGURES 12 TO IS 

 Histologic appearance of epithelioma of catfish, Ameiurns nebulosus 



FlC. 12. — Sections throush a rrprtarntative tumor showing delicate capillary loops in the normal tissue (lower third of 



CvafMCt muMS of epithelial cells which are supported by a photof;raph ) . Mac. X 10. 

 •CUrty vmscttlar stroma. Mag. X 170. Fic. 15.— Vascular bed of the livinR tumor at the margin 



F». ti.— In\-ask>n of the adjacent connective tissue by of a growing epithelioma. The distended vessels in the tumor 



Mophstk rpilhelial celb. Mag. X 200. are seen in the rinht half of the figure. Note the abrupt tran- 



FlO. 14.— Vascular bed of the living tumor (the upper sition between thr vesM-ls in the neoplastic area and the 



twMlrirds of the photograph). Note the dilatation and tor- capillary loops of tin normal lip on the left. Mag. X 30. 

 iModty of the ^Tssets in the tumor as compared with the 



720 



