PLATE 2 



EXPLANATION OF FIGURES 



56 Transverse section of the pars intermedia and infundibulum of an adult 

 turtle. X 500 (W. U. C. 200). 



57 Sagittal section of the tip of Rathke's pouch of a 9.2 mm. Aromochelys 

 embryo. X 500 (W. U. C. 91). 



58 Transverse section of pars intermedia and infundibulum of a 28 mm. 

 Aromochelys embryo. X 500 (W. U. C. 99). 



59 Transverse section of the anterior lobe of an adult alligator 150 cm. long. 

 X 500 (W. U. C. 210). Iron haematoxylin and orange G. 



a, acidophilic cells i, infundibulum 



b, basophilic cells /, residual lumen 



c, clear cells s, sinusoidal capillary 



278 



