PLATE 3 
EXPLANATION OF FIGURES 
4 Ventral aspect of the rostral end of the brain. > 4. 
5 Transection through the median ridge of the olfactory mucosa to show its 
innervation by trigeminal nerve fibers. Weigert method. 64. In adjacent 
sections the medullated fibers may be seen reaching the membrana propria. Note 
that the epithelium of the median ridge differs from that of the remainder of the 
Schneiderian membrane, particularly in the large number of goblet cells present. 
This is also a characteristic of the respiratory epithelium of mammals as distin- 
guished from the olfactory epithelium, which lacks almost entirely the mucus 
secreting cells. 
chias., optic chiasma; c. mam., corpus mammillare of Goldstein; fib. trig., 
fibrae trigemini; f. end., fissura endorhinalis, the sulcus rhinalis of Kappers (’06), 
the fovea endorhinalis externa of Kappers and Theunissen (’08), the fovea 
limbica of Goldstein, the fissura ectorhinalis of Owen; go. cells., goblet cells; 
hyp., pars gl., hypophysis, pars glandularis; hyp., pars nerv., hypophysis, pars 
nervosa; /am., lamella; lob. inf., lobus inferior; lob. lat., lobus lateralis hypo- 
thalami; lob. med., lobus medius hypothalami, of which the rostral part is the 
tuber or tuber cinereum and the caudal the pars infundibularis; memb. olf., mem- 
brana olfactoria, or olfactory portion of the Schneiderian membrane; memb. resp., 
membrana respiratoria, the respiratory part of the Schneiderian membrane; 
m. opl., nervus opticus; sac. vasc., saccus vasculosus; s. mam., sulcus mammillaris 
of Goldstein, separating the region of the corpus mammillare from the remainder 
of the lobus lateralis; tub. post., tubereulum posterius. 
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