Abstract
The vascularization of the pituitary region in Chimaera monstrosa L. (Holocephali) is described. There is a median eminence and a portal system connecting it with the anterior lobe. Lateral afferent veins bring blood from the lobi inferiores to the neuro-intermediate lobe. The “Rachendach-Hypophyse” is independently vascularized. The vascular system is fairly similar to that of Hydrolagus colliei and Elasmobranchs. The findings are discussed from functional and comparative viewpoints, and there are some notes concerning the interpretation of the “Rachendach-Hypophyse”.