THE HYPOPHYSIS IN REPTILES 



229 



In gross dissection, only the anterior lobe is seen from the 

 ventral side. This part ends cranially in a blunt point, caudally 

 it is oval in outline and rectangular in cross section. Near the 

 caudal end, on either side, he the cerebral carotid arteries (fig. 

 12) joined caudally by an anastomosing branch which lies against 

 the posterior end of the anterior lobe. Near the center, on 

 either side, lie striated muscle masses, probably some of the eye 



Figs. 9 to 13 Transverse sections of the hypophysis and brain floor of an 

 adult turtle. X 20 (W. U. C. 200). Stipple and lines as in figure 6. 



muscles. The bony cranium extends upward, encircling the 

 caudal end of the hypophysis. A definite layer of connective 

 tissue separates the anterior end from the floor of the brain. 

 A sagittal section shows two areas of contact between the hy- 

 pophysis and the brain, a caudal one to the infundibulum, and 

 an anterior one to the floor of the third ventricle (fig. 45). A 

 series of drawings of a transversely sectioned hypophysis was 



