Fig. 3. (A) Electron micrograph of a transverse section through the cocoon of a Neobatrachus aquilonius excavated from a claypan in 2003. D, distal; P, proximal; NR, nuclear remnant. (B) Enlarged section of the box shown in A, showing individual cocoon layers. CL, cell layer composed of the remnants of dead epithelial cells; SCM, granular sub-corneal mucous layer; M, example of typical layer width measurement taken to include the cell layer and its underlying mucous layer; V, section through a cell vacuole; CJ, cell junction.