The macroscopical and microscopical anatomy of the pituitary gland of the warthog (Phacochoerus aethiopicus) is described and compared with that of the Vietnam pig (a domestic race of Sus scrofa). The glands of the two animals differ considerably in shape but agree in anatomical details.
The morphological and histochemical characteristics of cells of the pars distalis are described in the warthog, bush pig (Potamochoerus porcus), Vietnam pig (all members of the family Suidae) and hippopotamus (Hippopotamus amphibius: Hippopotamidae). Close agreement was found between five cell types of the warthog and bush pig and the corresponding cell types in the domestic pig. The mucoid cells of the less closely related hippopotamus differed from those of the domestic pig in some morphological details.