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



Plate LXVII. 



Fig. 29. — Brook trout showing notiular growllis in yic. 3'). — Brook trout showiii^r miinerous tumor vetje- 



floor of mouth. tatious iu floor of month. 



Fig. 31. — Section of floor of mouth showiui^ th\roi(i follicles ^rowiu^ in epithelium above basal inembraue. X7n. 



