THE DIENCEPHALIC FLOOR DTD 
the floor tubercle of Schulte (46), the tuberculum postero- 
inferius. 
Fig. 8 Mesial view of forebrain reconstruction of 7mm. cat embryo. X 100. 
The unshaded area shows the cut surfaces of the reconstruction. 13, infundib- 
ular process; 17, infundibular region; 20, lamina terminalis; 24, mid-brain; 
25, mammillary region; 29, optic evagination; 34, post-infundibular eminence; 
37, post-mammillary evagination; 43, thalamencephalon; 44, telencephalon; 45, 
tuberculum postero-superius; 46, tubercle of the floor of Schulte. 
Cat embryo of 7 mm.; Specimen No. 266 (fig. 8). Changes in 
this embryo have occurred both in the mammillary and infun- 
dibular regions. The former now shows a subdivision into what 
must be considered the mammillary recess (26), and dorsal to 
this a smaller evagination, the post-mammillary recess (37). 
Both of these evaginations affect the median plane, while in 
the mammillary area two lateral diverticula have appeared, the 
anlages of the mammillary bodies. 
