A STUDY OF SOME TELEOSTS FROM THE RUSSELL 

 SUBSTAGE OF THE PLATTE CRETA- 

 CEOUS SERIES. 



By F. W. Cracin. 



Science owes to the Reverend Mr. H. C. Bradbury the 

 careful preservation of a specimen of Sijlhemiis Udifrons 

 from the Cretaceous of Kansas; and the writer is especially 

 indebted to him for the use of it in paleontolof^ical research. 

 It is but justice to Mr. Bradbury to say that it was submitted 

 for study long ago, at a time when all that was known of this 

 interesting fish-form was comprised in Cope's description 

 and figures of the type-specimen, and that preliminary studies 

 and drawings of Mr. Bradbury's specimen were made by the 

 writer some years ago, but were not then published. Impor- 

 tant supplementary knowledge has c^uite recently been added 

 by Mr. Alban Stewart in his paper on Kansas Cretaceous 

 Teleosts, in Volume VI. of the University Geological Survey 

 of Kansas. As the Bradbury specimen throws still further 

 light on both genus and species, as well as confirms in most 

 respects Cope's and Stewart's studies, atfording together with 

 these a fairly complete knowledge of this fish, the writer 

 here presents revised generic and specific diagnoses in which 

 the results of his own and renewed studies are incorporated 

 with the data of the authors named. 



Family SYLL/EiV\lD>E. 



Type-genus, Sijlhrmus Cope. 



As regards the systematic position of the genus Syllannus, 

 Prof. Cope rightly considered it allied to the Mugilidfe. Dr. 

 Zittel* placed it in the "Familie. Mugili formes. Harder"; 

 but Mugiliformes is a group of higher than family rank and 

 practically equivalent to the suborder Percesoces, since it 



*Handhiicli <lei- ('alii-ontoloKie, Vol. Ill, p. :M2. 



