HYPOPHYSIS OF PETROMYZON AND- AMIA 



271 



Text-fig. 15. 



Petromyzon fluviatilis. Ammocoete. Transverse 

 section showing the lapping of the lateral lobes back round 

 the pars intermedia. 



Tc He D\y PA Qch PI 



Petromyzon fluviatilis. Ammocoete. Longitudinal section. 



