Professor Marsh's Monograph of the Dinocerata. 199 
The size of Tinoceras ingens, a8 he stood in the flesh, was 
about twelve feet in length, or sixteen measured from the 
mammals, was about six thousand pounds. 
Dinoceras mirabile was about one-fifth smaller. The neck 
was longer, but, in other respects, the proportions were nearly 
the same.” 
Mevre 37.—Restoration of Tinoceras ingens, Marsh. One-thirtieth natural size. 
The concluding chapter, XIV, contains a full SS 
of the genealogy of ungulate mammals in general, an pe 
feitions of the Dinocerata to other groups. We quote 
‘OlOws: 
“Our present kn wledge of the Mammalia, living and extinct, 
clearly itate, that they must go back at least to the Permian. 
The Seneralized mammal of that period, or of still ee ae 
™ Probably quite small, and, in many respects, like an gre 
vor. This ‘primitive type would naturally possess a Posse 
Beneral characters found in later forms in the various orde 
of mammals. ° 
* This generalized mammal would belong to the group eer 
Hy otheria by Huxley, who has laid a sure foundation for 
“estigation in’ this line of research. 
