82 Marsh — A New Cretaceous Bird allied to Hesperornis. 



The differences between the present fossil and the corre- 

 sponding part in Hesperornis are, however, strongly marked. 

 In the latter, the distal end of the tibia is curved inward, and 

 the smaller inner condyle is especially prominent below. In 

 the present specimen, the outer condyle is the lower, and the 

 inner one is nearly on a line with the inner margin of the shaft, 

 as shown in figures 1 and 3, below. These characters are of 

 generic importance, and hence the present specimen may be 

 regarded as distinct from Hesperornis. The new genus it 

 represents may be called Coniornis, and the species may be 

 known as Coniornis alius. 



Figure 1. — Portion of right tibia of Coniornis alius, Marsh; front view. 

 Figure 1 a. — Section of same ; showing cavity. 

 Figure 2. — The same hone ; seen from the right. 

 Figure 3. — The same bone; back view. 

 Figure 3a. — The same ; seen from below. 



All the figures are one-half natural size. 



The present type specimen indicates a bird about two-thirds 

 the size of Hesperornis regalis, Marsh, or about four feet in 

 length, from the point of the bill to the end of the toes. It 

 was recently found by Mr. J. B. Hatcher, near the mouth of the 

 Judith River, in Montana." 



itfew Haven, Conn.. Dec. 12th. 1S92. 



