246 KANSAS UNIVERSITY SCIENCE BULLETIN. 



the fin cannot be ascertained. Apparently it was broad and 

 firm. 



Owing to the isolated condition of the specimen its specific 

 position cannot be determined, and any attempt to do this 

 would be only a guess. It is an important specimen, however, 

 since it definitely places the genus in the family PacJiycormidie, 

 upon the assumption that only the uncertainty of vertebral 

 characters previously made the classification doubtful. 



BIBLIOGRAPHY. 



Cope, E. D., 1875. Report of the U. S. Geological Survey of the Terri- 

 tories, vol. II. The Vertebrata of the Cretaceous Formations of the 

 West. 



Crook, A. R., 1892. Ueber einige fossile Knochenfische aus der mittleren 

 Kreide von Kansas. Stuttgart. 



Hay, O. p., 1898. Observations on the Genus of Fossil Fishes called by 

 Professor Cope Portheus, by Doctor Leidy Xiphactinus. Zoological 

 Bulletin, vol. II, No. 1. 



Stewart, Alban, 1900. Teleosts of the Upper Cretaceous. The Uni- 

 versity Geological Survey of Kansas, vol. VI. 



