Bull. U. S. B. F. 1912. 



Plate LVI. 



KiG. 1. — From Scott's Cancer in Fish. " 1891. Floor of mouth of Saluio fnnlinalis. showing protrusion of tumor in 

 pharyngeal floor. 



Fk;. 2. — Drawing from microscopic section showing acini with infiltration of surrounding structure of individual 

 cells. After Scott. 



