594 



JAMES B. ROGERS 



TABLE 2 



Average volutins of thymus and pituitary glands. Cu. mm. 



Thyroidless 



Average volume of anterior lobe of the pituitary gland of: 



Controls 



Normal tadpoles, Specimens 5 to 10 ' 152 



Young frogs, Specimens 13 to 16 138 



Young sexually mature frogs, Specimens 17 to 24 416 



Thyroidless tadpoles, Thyroidless 7 to 10 776 



