Fig. 3. (A) Head of a neonate Z. cavirostris. Arrowheads point to transverse slices (A–O) that were taken through the melon. (B) Anterior side of a transverse slice through the melon, which corresponds to slice K, from A. Skin, blubber, connective tissue, muscle and melon tissues are noted. (C) Transverse melon slice K, showing grid-like sampling of tissues into numbered cubes. (D) Transverse CT scan image of slice K. Maxillary and mandibular bones are visible as bright white areas. Between these is the tongue. A blubber sheath can be seen surrounding the animal. The connective tissue, muscle and melon fats can be discerned in the upper portion of the figure. Interior and exterior mandibular fats can be seen inside of and around the mandibular bones. Throat grooves are also visible.