48 
EDWARD B. POULTON. 
are generally granular, although many of them retain the characters of the 
cells of the deeper layers of the rete Malpighii. 
Fig. 12. — X 405. A vertical section through a few granular cells which 
are becoming corneous peripherally. 
Fig. 13. — X 50. A transverse vertical section through the oral epithelium 
of the right side anterior to the upper true teeth in the young animal. The 
section was the seventh in front of the most anterior which contained teeth, 
viz. that which is figured in Plate IT, Fig. 1. The thickened epithelial ridge, 
which perhaps represents the anterior part of the posterior horny plates, is 
shown in section. 
