228 E. A. BAUMGARTNER 



trally, this lamella of cells is continuous with the proximal por- 

 tions which surround and fuse with the anterior lobe. Caudal 

 to this fusion, between the hypophysis and the brain, is a layer 

 of vascular connective tissue separating the pars intermedia 

 from the anterior lobe. Farther back the two lobes are closely 

 united. The pars intermedia is closely attached to the floor 

 of the infundibulum, which is divided into several branches, 

 partially separated by projections of the pars intermedia. 



In one specimen of a young adult Chrysemys, a small dilated 

 tubule, about 0.5 mm. long, originating caudal to the middle of 



Figs. 6 to 8 Transverse sections of the hypophysis and brain floor of a 28 

 mm. Aromochelys. X 40 (W. U. C. 99). Fine stipple, anterior lobe; coarse 

 stipple, lateral lobes; black, brain and infundibulum; C, carotid artery. 



the hypophysis, is imbedded in the ventral surface of the ante- 

 rior lobe. Leaving the hypophysis it extends forward and down- 

 ward, is continued through a small canal in the basis cranii for 

 about half its length, and ends immediately below the floor of the 

 cranium near the anterior end of the hypophysis. The epi- 

 thelium of the oral roof is not included in the sections, but the 

 tubule appears to end blindly in front. 



The hypophysis in adult Chrysemys elegans and Pseudemys 

 picta forms a large ovoid body, closely applied to the floor of 

 the brain. Its length is about 3.4 mm. to 4.0 mm. and its 

 width, 1.0 mm. 



