1'LATE 4 



EXPLANATION OF FIGURES 



G3 Anterior view of a reconstruction of the hypophysis of a 5 mm. Lacerta 

 agilis. X 150 (M. U. E. C. 559). 



64 Anterior view of a reconstruction of the hypophysis of a 9 mm. Lacerta 

 agilis. X 120 (M. U. E. C. 576). 



65 Left view of a wax reconstruction of the hypophysis of a 15 mm. Lacerta 

 agilis. X 120 (M. U. E. C, 562). 



66 Anterior view of the hypophysis of a 5 mm. Colubra embryo. X 120 

 (M. U. E. C. 567). 



A, anterior bud R, Rathke's pouch 



I, lateral buds 5. stalk. 



M, epithelium of mouth 



282 



