PAET III. 



SYNOPSIS OF THE KNOWN CRETACEOUS VERTEBRATA OF 



NORTH AMERICA. 



The following catalogue includes species which have been derived from 

 all of the members of the Cretaceous formations excepting No. 1, which has 

 not yet yielded vertebrate fossils. 



No species has been introduced into the list which has not been described, 

 and no genus has been adopted which has not been described. Reference is 

 made to the place where such descriptions can be found in both cases; and, 

 where such citation is omitted, it is understood that the name is provisional 

 only, and that any name employed by the future describer of the genus will 

 be substituted for it in future editions of this list. 



AYES. 



NATATORES. 



HESPERORNIS, Marsh. 



American Journal of Science and Arts, 1872, p. 360. 



Hesperornis regalis, Marsh. 



American Journal of Science and Arts, 1872, p. 56 ; {. c, 1872, p. 360. 



Niobrara group, or No. 3, of the Smoky Hill River, Kansas. 

 ORACULAVUS, Marsh. 

 Graculavus anceps, Marsh. 



American Journal of Science and Arts, 1872 (III), p. 364. 



Niobrara Cretaceous of the Smoky Hill. 



LAORNIS, Marsh. 

 Laornis edwardsianus, Marsh. 



American Journal of Science and Arts, March, 1870. 



Cretaceous greensand, No 5, of New Jersey. 



