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PERIDENTA L MEMBRANE. 153

Fig. 137.

Lon-itudinal section: Ep, epithelium lining the gingival space; Gg, gingival glan J>, dentin ; iV, Nasmyth's membrane ; />«, duct-like structure stretching away toward the gin-
givus from the epithelial cord, seen at Ec ; Cm, cementum, separated from the dentin by
decalcification. (About 50 X.)