INTRODUCTION 5 



Marshall, A. M. 1912. The Frog: An Introduction to Anat- 

 omy, Histology, and Embryology. 11th Ed. The Macmillan 

 Company, New York. 



MICROSCOPIC TECHNIQUE 



GuYER, M. F. 1924. Animal Micrology. 2d Ed. University of 



Chicago Press, Chicago. 

 Kingsbury, B. F., and Johannsen, 0. A. 1917. Histological 



Technique. John Wiley & Sons, New York. 

 Lee, a. B. 1921, The MicrotomisVs Vade-Mecum. 8th Ed. 



P. Blakiston's Son & Co., Philadelphia. 



EMBRYOLOGY 



Marshall, A. M. 1893. Vertebrate Embryology. G. P. Put- 

 nam's Sons, New York. 



Morgan, T. H. 1897. The Development of the Frog's Egg. 

 The Macmillan Company, New York. 



Shumway, W. 1927. Vertebrate Embryology. John Wiley & 

 Sons, New York. 



