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Figs. 18-20 Antero-ventral views of the reconstructions shown in figures 
11 to 13. Figure 18, x 50; figures 19, 20, X 40. oe, 
Figs. 21-23 Anterior views of the reconstruction shown in figures 14 to 16. 
x 40. 
Figs. 24-25 Ventral views of the reconstructions shown in figures 17 and 1. 
Figure 24, x 40; figure 25, X 25. For abbreviations, see figure 1. 
418 
