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 fom- 

 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. Enaliornis harretti and 

 K sedgwichi 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 Ba.ptornis of the North American Cretaceous strata, which, 

 like the two last-named, is much smaller than Hesiperomis. 



