12 
if we take the Morrison Ornitholestes as a typical example of that group. 
The gigantic Dinodontidse, it is true, have lateral cavities in the dorsal 
vertebrae, but as in the other families mentioned above, there are none in 
the caudal region. Although these vertebrae may have relationships with 
a form like Chirostenotes, this suggestion appears rather improbable because 
of the Coelurid-like manus in that genus. There remains only the Dro- 
maesaurinae to be considered, but since vertebrae are as yet unknown of this 
sub-family a correlation of these specimens cannot be made. 
The fragmentary nature of the known materials precludes the idea 
of naming these vertebrae, but they are at least of very great interest as 
showing a type of vertebral construction not before recognized, so far as 
I am aware, in the Upper Cretaceous deposits of North America. 
