50 E. R. HOSKINS AND M. M. HOSKINS 



Rogers, J. B. 1918 The effect of the extirpation of the thyroid upon the thymus 

 and the pituitary glands of Rana pipiens. Jour. Exp. Zool., vol. 24. 



RoGOWiTSCH, N. 1889 Die Veranderungen der Hypophyse nach Entfernung 

 der Schilddriise. Beitr. z. path Anat. v. z. allgem. Path., Bd. 4. 



Smith, P. E. 1916 The effect of hypophysectomy in the early embryo upon the 

 growth and later development in the frog. Anat. Rec, vol. 11. 

 1917 The effect of hypophysectomy upon the subsequent growth and 

 development of the frog (Rana boylei). Anat. Rec, vol. 11. 



Stieda 1890 tJber das Verhalten der Hypophyse des Kaninchens nach Entfer- 

 nung der Schilddriise. Ziegler's Beitr. z. path Anat., Bd. 7. 



Swingle, W. W. 1918 The effect of inanition upon the development of the 

 germ glands and germ cells of frog larvae. Jour. Exp. Zool., vol. 24. 



Terry G. S. 1918 Effects of the extirpation of the thyroid gland upon ossi- 

 fication in Rana pipiens. Jour. Exp. Zool., vol. 24. 



Zeleny, Charles 1909 a Effect of successive removal upon the rate of regener- 

 ation. Jour. Exp. Zool., vol. 7. 



1909 b The relation between degree of injury and rate of regeneration. 

 Ibid. 



