206 O. C. Marsh on Cretaceous and Tertiary Birds. 
REMAINS OF CRETACEOUS Brrps. 
Among the fossils under consideration are specimens indicat- 
ing five species of Cretaceous birds, the remains of which were 
found in the greensand of New Jersey, and with a single ex- 
ception in the middle marl bed. e specimens are all miner- 
alized, and in the same state of preservation as the bones of the 
extinct reptiles which occur with them in these deposits; and 
hence are readily distinguished from the remains of Post-tertiary 
and recent birds, which have occasionally been found near the 
surface in the greensand excavations of that region. In most 
instances, moreover, a record of the discovery places the geolog- 
ical horizon of the present fossils beyond a doubt. 
Laornis Edvardsianus Marsh, gen. et sp. nov; 
that the tibia, when entire, was of medium ira a and quite 
robust. The condyles of the distal end are broader anteriorily 
. 
tendinal bridge—one of the most characteristic portions of the 
elevation, which is separated by a shallow transverse groove from 
the exterior condyle. To this prominence the outer end of the 
the wild goose (Berniela Canadensis Boie), although 
rather deeper, and more oblique. The under trochlear s 
o is but slightly concave transversely, and has a faint median ele- 
_ Vation, as in the tibia of t 
ation, as in the tibia of the swan; but in the present specimen 
Ms 1s continued along the entire posterior surface, which 1s 
, with a slight, transverse concavity. On the lower surface 
