414 E. A. BAUMGARTNER 
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Fig. 16 Left lateral view of a reconstruction of the hypophysis of a 48 mm. 
embryo. > 100. For abbreviations, see figure 14. 
the exception of a cone-shaped mass of cells connected with the 
oral epithelium, and an irregular area in the floor of the hypophy- 
sis which represents the remains of the former attachment 
(fig. 8). The furrow uniting the two inferior lobes across the 
middle line is more marked, and the superior lobe also is promi- 
nent. The anterior end of the hypophysis now extends forward 
and downward. The straightening out of the.-head bend in the 
development of the embryo has probably helped to bring about 
this change. 
More marked changes have taken place in a 48 mm. embryo 
(fig. 16). The anterior end of the anterior lobe is wider than in 
earler stages. A short and narrow middle part connects this 
portion with the caudal extremity which is considerably: wider 
(fig. 23). The inferior lobes are attached to the, now, ventral 
(caudal) side of this part. The ridge connecting the two infe- 
rior lobes has become very pronounced but still opens widely into 
