390 ELIZABETH CAROLINE CROSBY 
H.p.dm 
N.tr olf lat: 
N. olf ant. VILA. (5.¢) 
Vi A.(s.cY 
Tolf. 
Figs. 3-12 A series of transverse sections through the hemisphere of Alli- 
gator mississippiensis. Toluidin blue. X 19. The serial numbers of the sec- 
tions figured are appended to the descriptions. 
Fig. 3 Section through the posterior part of the olfactory crus showing the 
anterior part of the pyriform lobe and the hippocampus (14: 286) 
Fig. 4 Section slightly caudad to the preceding, showing the primordium 
of the general cortex (16 : 318). 
Fig. 5 Section illustrating the characteristic appearance of the general cor- 
tex (18 : 353). 
Fig. 6 Section somewhat caudad to the preceding (19: 370). 
Fig. 7 Section through the posterior part of the primordium of the general 
cortex, showing the basal nuclei of the lateral and medial walls in that region 
(22 : 416). 
Fig. 8 Section slightly caudad to figure 7 (23 : 436). 
