II HESPERORNITHES—-ENALIORNITHES 47 
grooves of both maxilla and mandible, the number being thirty 
or more below, but considerably less above, where they did not 
reach to the anterior extremity. The bill was long and pointed, 
the rami of the lower jaw being entirely separate; the head was 
rather small, the neck was long, and the quadrate bone articulated 
with the skull by one knob only. The sternum was long, broad, 
and flat, without keel; the furcula was decidedly reduced, the 
metatarsus was moderate and laterally compressed ; there were four 
toes, all directed forwards and probably webbed; the wing was 
rudimentary, being little more than a humerus: the tail was fairly 
long and broad, but had no pygostyle. Hnaliornis barrett: and 
E. sedgwicki of the Cambridge Greensand had leg-bones very 
similar to the above, but being only known from fragmentary 
remains, their position is uncertain ; while the same may be said 
of Baptornis of the North American Cretaceous strata, which, 
like the two last-named, is much smaller than Hesperornis. 
