240 ROYAL SOCIETY OF CANADA 
PrATE NI: 

View from above of cotype of Leidyosuchus canadensis; 
seven-eighths natural size. 
ALS, alisphenoid; b, suture for quadratojugal ; e.a.m, external au- 
ditory meatus. Other letters as in plate IL fig. 3. 
Figure 9. 
Figure 10.—Anterior end of right maxilla as seen from above; 10a, 
the same specimen viewed from below. Natural size. 
m, notch for fourth mandibular tooth; n, suture for nasal; pm, 
suture for premaxilla. 
Figure 1c.—Transverse section of mandible (shown in plate I, figs. 1, 
la, 1b) through the alveolus for the seventh tooth. Natural 
size. 
D, dentary; SP, splenial; dc, dental canal; dg, dentary groove; 
{, foramen; vii, alveolus for seventh tooth. 
Figure 2a.—Transverse section of dentary (shown in plate I, fig. 2) 
through the alveolus for the fourth tooth. Natural size. 
dg, anterior end of dentary groove; g, germ tooth; iv, fourth tooth ; 
s, symphysial surface of dentary. 
