EXPLANATION 
OF 
PLATE 10. 
in. buccinnlorius 
phUysmu, prtslaimcular part 
Iutysma-hundlcs arising from the hind margin of the auricle 
jdnlysmn, b (vide p. 22) 
plalysma, prtcauricular part 
m. orbicularis 
m. pneorbicularis 
m. sphincter .superficialis 
m. s])hincter profundus 
plalysma 
a (vide p. 8, footnote 1) 
Fig. 1. Superficial facial muscles of Echidna from the right side, 
raised the snout very much. 
The specimen figured lias accidentally 
Fig. 2. The same specimen turned so that il is seen more from the ventral side, after removal of a large 
part of the m. sphincter superficialis, whose connection with the m. sphincter profundus is distinctly seen. 
Fig. 3. Hinder part ol head ot the same Boar as figured in PI. 9. Il is seen somewhat more from the 
ventral side. The upper end of the m. sphincter superficialis and the hinder end of plalysma have been 
moved. Of the muscles only the sphincleres and the plalysma have been represented in colours. 
re- 
