270 Marsh's Monograph on the Odontornithes 
which Hesperornis swam. Both of these birds were clearly — 
aquatic in habit, as shown by various points in their structure, — 
already described, and the conditions under which their remains — 
were deposited. In many respects, /chthyornis probably resem- 
bled the modern Terns in its mode of life. The powerful — 
wings and small feet suggest similar habits in flight, and rest. 
Figure 9.—Restoration of Ichthyornis victor, Marsh. One-half natural size, 
That Ichthyornis was provided with feathers is proved bey ee 
question by the tubercles for the attachment of quills on t 
orearm. 
“ Besides Ichthyornis and its allies, the only other denizen 
of the air at present known to have then inhabited the same 
