iUL39l«^ 



Kansas University Quarterly. 



Vol. VIII. JULY, 1899. No. 3. 



Notice of Three New Cretaceous Fishes, with 

 Remarks on the Saurodontidae Cope. 



Contributions from the Paleontological Laboratory No. 45. 



BY ALBAX STEWART. 



XIPHACTINUS LEIDY. 



Xiphactinus brachygnathus, sp. nov. 



In the collection of fossil fishes in the museum of the Uni- 

 versity of Kansas there is one specimen of Xiphactinus, (No. 155), 

 that I have been unable to locate in any of the species described by 

 Professor Cope. It evidently does not belong to the forms which I 

 have referred to X. ai/dax,^ and does not agree with the descriptions 

 of A'. Icsirio or A', niiidgei, although our knowledge of these two 

 forms is somewhat vague, owing to the preliminary manner in which 

 they were described by Professor Cope. However, the characters 

 upon which this species is based are such, I am confident, that 

 Professor Cope would have mentioned them if they had occurred in 

 either of the species mentioned. In my paper, (Individual Vari- 

 tion in the genus Xipiiactiniis Leidy),* I figured this specimen and re- 

 ferred it for the time to X Irstrio, but was far from being con- 

 vinced that it belonged to this species. 



The premaxilla is somewhat oval in outline and the anterior por- 

 tion is thickened instead of the central part, as is usually the case 

 in X. audax. The posterior border is thin, and is peculiar in hav- 



*KaLis Univ. Qua,it. Vol. vii, pp. 115-]<». PI. viii, No. 155. 



(107) KAN. UNIV. QUAR., VOL- VIII, NO. i. .JCLY, 18i)'J, SERIES A. 



