HYPOPHYSIS OF PETROMYZON AND AMIA 289 



Text-fig, 33. 



Amia calva. 11 mm. long. The hypophysis with a hypophysial 

 cavity separated from the dorsal wall of the gut by connective 

 tissue. 



Text-fig. 34. 



Amia calva. The same as Text-fig. 33, higher magnification. 



