Fig. 6. SEM images of the dry gula. (A,C,D) Surface of the gula. (B) Cross fracture of the gula cuticle showing the epicuticle (epi), exocuticle (exo) and endocuticle (endo). Fibres of the outer part of the exocuticle are oriented perpendicular to the surface but are parallel in the deeper layers of the exocuticle and in the endocuticle. Pores (pr), dried organic substances (se) and cracks (cr) can be seen on the cuticle surface. c, d, rectangles indicate parts of the sample magnified in C and D, respectively.