endocuticlen.

1929 F. L. Campbell in Ann. Entomol. Soc. Amer. XXII. 415 Following the suggestion of Mr. R. E. Snodgrass, of the Bureau of Entomology, the writer calls the extremely thin outermost layer (Grenzlamelle) the epicuticula, the brittle, pigmented outer layer (epidermis, Pigmentschichte) the exocuticula, and the flexible, colorless inner layer (dermis, Hauptlage) the endocuticula.

1935 L. A. Borradaile & F. A. Potts Invertebrata (ed. 2) x. 309 The arthropod cuticle has a thin, impermeable, non-chitinous external layer (epicuticle) and a thick, elastic, permeable, lamellar inner layer (endocuticle), largely composed of chitin.

1967 P. A. Meglitsch Invertebr. Zool. xvi. 676 The endocuticle is a continuous layer..and particularly important in the flexible membranes between the skeletal plates.

1949 J. Lindberg et al. in Textile Research Jrnl. XIX. 674/1 Proceeding from the outside of the fiber inward..the following have been described: (a) a very thin epicuticular membrane..forming the external surface of the fiber, (b) an exocuticle layer and (c) an endocuticle... The epicuticle, as seen in the electron microscope, appears as a thin, uniformly thick..film falling easily into folds.

1956 Nature 18 Feb. 319/1 [They] described sections of hair in their study of the cuticle layer. They now believe..that the endocuticle is non-keratinous in character.

1962 W. J. Onions Wool ii. 16 Electron microscopy of silver stained, reduced fibres suggests that the exocuticle contains more sulphur than the endocuticle, which is a layer resistant to alkaline extraction but not to trypsin.