278 KANSAS UNIVERSITY SCIENCE BULLETIN. 



especially the Coelacanthidse, in which he has described the 

 form of the muscle fibers, the swim bladder and other struc- 

 tures. Eastman and Parker (21) have described the preserva- 

 tion of the brain, the internal ear and arterial vessels in 

 Rhadinichthys deani Eastman from the base of the Waverly 

 shales, Kentucky. Dean (20) has mentioned the preservation 

 of the lateral line sensor^' canals of the head, the auditory 

 organ and the rim of the nasal capsule in Acanthodes bronni 

 from the Pe/mian of Lebach, preserved in the Berlin Museum. 

 Fritsch (7) has described very accurately the outlines of the 

 body and fin membranes of Pleur acanthus. Traquair (5), 

 Dean {1) and Sollas {9) have added to our knowledge of the 

 anatomy of Paleospondijlus. Patten (iO), Eastman, Traquair 

 and others have written on various structures of the Ostra- 

 cophores. Other authors have contributed from time to time 

 on the subject, until we have, in some instances, e. g., Bothrio- 

 lepis, Paleospondylus, Cladoselache, a fairly definite idea as 

 to the outward form and internal structure of the creature. 

 Among higher animals something has been done on the soft 

 anatomy of the extinct Amphibia, Ichthyosauria, and Dino- 

 sauria. 



It is with some degree of pleasure that the w^riter is able to 

 add to the knowledge of the soft anatomy of extinct forms by 

 the discussion of the alimentary canal of two Cretaceous fishes. 

 One is a species of Empo, probably E. nepaholica Cope, from 

 the Niobrara Cretaceous of western Kansas, and the other is 

 a new species of clupeoid fish from the Cretaceous of Texas. 



The specimen which probably belongs to Empo nepaholica 

 Cope consists of the cast of a large stomach which, in all 

 probability, represents a fish of some ten or twelve feet in 

 length. It is No. 347 of the University of Kansas Paleontologi- 

 cal Collection. The remains were discovered in 1897 by Mr. 

 H. T. Martin in the Niobrara chalk four miles northwest of 

 Elkader, Kan. The specimen has recently been presented to 

 the Museum of the University by Mr. Martin. 



The specimen consists of a cast of the larger portion of the 

 alimentary canal of a large species of fish. Attached to the 

 matrix of the cast on one side is the major portion of the right 

 pectoral fin, which is described and figured below. So far as 

 the writer is aware, the present specimen is the most perfect 

 example of the pectoral limb of an Empo which has been de- 



