Bull. U. vS. B. F. 191 2. 



Plate LX. 



I-iG. 14.— Scotch sea trout. I.ongitudinal section of lower jaw above showiiiE normal thyroid follicles: below, in 

 the right hand corner, an isolated misplaced thyroid follicle Ijiiig adjacent to the epithelium of the pit. Xlu. 



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