TELEOSTS OF THE UPPER CRETACEOUS 



By ALBAN STEWART. 



INTRODUCTION. 



About two years ago, through the kindness of Dr. S. W. 

 Williston. 1 was given the privilege of working up for publica- 

 tion the excellent University collection of teleost fishes from the 

 Upper Cretaceous formations of western Kansas, the results of 

 which are given in the following pages. At the time the work 

 was begun the literature on the subject was poorly represented 

 in the University library, and, as some of it was very hard to 

 obtain, the work has been delayed on this account, causing 

 a later appearance of it than was first expected. However, it 

 is hoped by the author that it is fairly complete, and that it 

 will be a guide to students of the Cretaceous ichthyology of 

 North America, and especially that of Kansas. 



For more than twenty years past the Kansas Cretaceous fishes 

 have been almost entirely neglected by writers on ichthyology, 

 and not since the publication of Professor Cope's " Vertebrata 

 of the Cretaceous Formations of the West," in 1875, has any 

 work appeared beyond a few scattering papers on some special 

 form or group ; and, with the exception of those by Prof. 0. P. 

 Hay and myself, these have all been written by students of Ger- 

 man universities, from collections which have been made in 

 Kansas and sent to the museums there. Thus, it seems very 

 proper that there should be a more complete work undertaken 

 at home, where the collecting grounds are easy of access and 

 the collections are probably more complete than elsewhere. 1:: 



In addition to the original collection made by Chancellor F. 

 II. Snow, Dr. S. W. Williston, and others, the geological < \- 



13. Se>' also the Appendix to tlii- part.— 8. W. W. 



i 257 



