CARMTIORA TERA 499 
Mites Vo and Ursus (V1), the heel is greatly developed, broad, and 
tuberculated. The blade im these cases is generally placed obliquely, 
irs flat or convex (outer) side looking forwards, so that the two 
lobes are almost side by side. instead of anterior and posterior. 
The inner cusp (3) is generally conical, pointed, and placed to the 
inner side of the hinder lobe of the blade. The special characters 
of these teeth are more disguised in the Sea Otter (Zafar) than 
in any other form, but even in it they can be traced. 
The homology of the various parts of the Carnivorous carnassial 
I, Felis ; u, Can 
said) of blade ; 2. po a 
iin (aypocenid) Ir will be seen that the 
to the development of the partiva of the crown 
Fre. 221.—Le® lower carmassis! teeth ef Car 
IV, Dutra: V, Meles: VI. Crsesx 2. Att lobe 
lobe of blade + 3, inner c= 
relative sie of the two roots varies sented 
chey Lave respectively to saprest 
ih E. 
I 
F 
uy 
az 
with the primitive titubercular type (p. 30) is indicated in the 
feures. It may be observed, however, that the anterior lobe of the 
three-lobed upper carnassial is an element added on to the more 
primitive two-lobed type. When the talon of the lower carnassial, 
as In Canis, consists of a large outer and small inner cusp, the latter 
imot seen in the figure) is the entoconid. 
The toes are nearly always armed with large, strong, curved. 
and telerabiy sharp claws, ensheathing the ungual phalanges, and 
held more firmly in their places bv broad lamine cf bone reflected 
over their attached ends trom the bases of the phalances. In some 
forms, most notably the Felidae, these claws are retractile ; that is to 
