1074 Marvels of the Universe 
SKELETON OF TINOCERAS. 
As set up by Professor Marsh, who discovered its fossil bones in Wyoming. It is twelve feet long. 
An examination of the remarkable skull shows that it had six stout prominences on the head, 
which may have been horns of some sort, of which only the cores, or bony supports, are left. Pro- 
fessor Marsh thinks that it is possible that natural casts of these horns may have been left in some 
of the beds to reward further research. On the other hand, the bosses on the skull may only 
represent that stage in mammalian evolution when horns were beginning to develop. There is a 
suggestion of Brontops in the head of our restoration, though it will be noticed that, quite apart 
from the profusion of horns or bosses, there is a striking difference in Tinoceras possessing a pair 
of tusks that are dagger-like. 
There was not much accommodation for brain in that skull, but the mammals of the Eocene 
period are remarkable for their small brains. The five toes show that Timoceras had no close 
connection with the modern rhinoceros, but probably represents an early stock from which both 
rhinoceros and elephant branched off. 
THE GUACHARO, OR OIL BIRD 
BY SIR HARRY JOHNSTON, G.C.M.G. 
Tuts is one of the strange “‘ stranded” types of bird for which South America is so remarkable. 
South America as a continent is only less isolated and primitive in its fauna than Australia. During 
a long period of the earth’s history it must have been completely cut off from North America and 
intermittently united across the Atlantic with Africa, and by Antarctica even with Australia and 
New Zealand. Consequently it received intermediate generalized half-and-half forms of beast, 
bird, and reptile, which, when it became an island-continent, continued to exist there, whereas 
