FIGURE 2. Scheme listing all arrangements proposed for turtle m. adductor mandibulae structures in the literature. The pictures are redrawn from Schumacher (1953-73). The appreviations, boxes, arrows, and breakups of words follow the style of Schumacher. German words are translated. Slight modifications are made in the scheme of Schumacher (1954-55a) to approximately correlate its muscle parts to those of other schemes. Note the "historically" shifting position of Pars porterior ("M. add. mand. posterior") in relation to the other muscular structures; also the parts of m. adductor mandibulae internus were categorised differently. Continued in Figure 3 and Figure 4.