238 RDYAL SOCIETY OF CANADA 
Prare Il. en 
> 
Figure 3.—Back view of cotype of Leidyosuchus canadensis; seven- 
eights natural size. 
B.OCC, basioccipital: B.S, basisphenoid; EX.OCC, exoccipital ; 
F.M, foramen magnum; M.E.C, opening of median Eustachian canal; 
PA, parietal; Q, quadrate; S.OCC, supraoccipital; a, broken surface 
of base of occipital condyle; c, suture for squamosa!; d, foramen con- 
necting with tympanic cavity; VII, X, XII, foramina for cranial nerves ; 
C.A, foramen for carotic artery; e, canal between quadra‘e and exocci- 
pital wing. 
Figure 4.—Tooth, side view; 4a, inner view. Natural size. 
Figure 5.—Tooth, side view; 5a, inner view; 5b, ba-al view; 5c, cross 
section at mid-height. Natural size. 
.—Tooth, side view: 6a, inner view; Gb, cross section at mid- 
height. | Natural size. 
Figure ( 
Figure 7.—Tooth, side view; Ya, inner view. Natural size. 
Figure 8.—Tooth, side view.; 8a, inner view. Natural size. 
