180 FELID A. 
convex margin becoming thicker there, like the back of a 
knite, to give strength; and the power of the tooth being 
farther increased by the expansion of its sides. ‘Thus, 
as in the Aegalosaurus, cach movement of the jaw with 
Fig. 69. 
SSS 
a = 
Canine of Machairodus latidens, nat. size. Kent’s Hole. 
a tooth thus formed combined the power of the knife 
and saw; whilst the apex, in making the first imcision, 
acted like the two-edged point of a sabre. The back- 
