This is known as the cuticula dentis, or Nasmyth’s membrane, and is believed to be the last-formed layer of enamel derived from the adamantoblasts, which has not become calcified.    From Wordnik.com.  [XI. Splanchnology. 2a. The Mouth] Reference

Epiderma - is: the cellular layer of the skin, underlying and secreting the cuticula: incorrectly applied to the outer skin or cuticle.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

Hypoderm - is: the cellular layer which secretes the chitinous cuticula and in this sense = epidermis: specifically applied to the lining membrane of elytral and hemelytra.    From Wordnik.com.  [Explanation of Terms Used in Entomology] Reference

L — n seemed a little confounded at this remark, and assured him it was nothing but a common excrescence of the cuticula, but that the bones were all sound below; for the truth of this assertion he appealed to the touch, desiring he would feel the part.    From Wordnik.com.  [The Expedition of Humphry Clinker] Reference

& cortice coriaceo ut in reliquis mulcis obduftum; alterum vero latus quafi dilTeftum, & dein cuticula veluti tenuiore flavcTcente obduftum y calido & hu - mido coelo fe expandens ut gibbofius fiat; frigore autem & arida tempeftate planum magis evadit«.    From Wordnik.com.  [Caroli a Linné equit. aur. de stella polari archiatri regii med. et botan. profess. Upsal. Acad ...] Reference

G capitulum maturum 9 cuticula partim derafa.    From Wordnik.com.  [Caroli a Linné equit. aur. de stella polari archiatri regii med. et botan. profess. Upsal. Acad ...] Reference