216 Prof. 0. C. Marsh on Hesperornis regalls and 



millims. 



Greatest diameter of proximal end of humerus 23-75 



Vertical diameter of articular head 13 



Transverse diameter 6 



Proximal extension of head beyond ulnar crest 4*6 



Least diameter of shaft below proximal extremity .... 6 



The specimens on which this species is based were found by 

 John G. Meirs, Esq., at Hornerstown, New Jersey, in the 

 greensand of the upper Cretaceous, and by him presented to 

 the museum of Yale College. 



Graculavus pumilus^ sp. nov. 



The present species, which is hardly more than one third 

 the size of the preceding, is likewise represented by the 

 proximal end of a humerus, as well as by some other cha- 

 racteristic remains. The articular head in this specimen is 

 equally compressed, and shows the same prominent apex, but 

 is without the anconal deflection which distinguishes the 

 larger species. The lower half of the head is narrower trans- 

 versely, and separated from the internal trochanter by a wider 

 notcli. The median ridge, moreover, on the anconal face is 

 much more acute. 



millims. 



Greatest diameter of proximal end of humerus 13-25 



Vertical diameter of articular head 8 



Transverse diameter 4 



Least diameter of shaft below proximal end 3-1 



Greatest diameter of metacarpal at distal end 5-5 



Least diameter 3-75 



The known remains of this species are from the same locality 

 and geological horizon as the preceding, and were also dis- 

 covered by John G. Meirs, Esq. 



Graculavus anceps, sp. nov. 



The only fossil bird-remain secured during the explorations 

 of the Yale-College party of 1870 in the Cretaceous beds of 

 Kansas, although special search for them was made, was the 

 distal extremity of a left metacarpal, which is so well preserved 

 and so characteristic a part of the skeleton, that it indicates 

 with considerable certainty the affinities of the bird to which 

 it belonged. A careful comparison of this specimen with the 

 corresponding bone in recent birds has made it apparent that 

 the species was a near ally of the Cormorants ; and it may 

 therefore be referred provisionally to the genus Graculavus^ 

 until further discoveries determine its position more accurately. 

 The specimen implies a species about the size of the Violet- 



