Stewart.] Cretaceous Fishes. 3;>7 



directed slightly downward. Inferiorly they form a prominent 

 ridge on each side which extends inward toward the median 

 line. The occipital condyle is rather flat in this specimen, but 

 in another specimen, where the back of the skull is shown, the 

 condyle is deeply concave. It is likely that this specimen may 

 be of another species, as it seems to be more narrow than the one 

 under consideration. It is crested below and united with the 

 exoccipitals by well-marked sutures. There are several other 

 bones at the base of the skull, but they are so badly crushed 

 and their sutures so obliterated that they cannot be made out 

 with any degree of certainty. 



Total length of skull 239 mm. 



Distance across postorbitals (estimated) 126 " 



A portion of the pectoral fin is present, with fragments of the 

 pectoral girdle. The rays are small in size and seem to be very 

 numerous. They are nearly straight, excepting near the proxi- 

 mal end where they are strongly bent. The distal end of each 

 ray is cross-segmented. 



Empo lisbonensis. Plate LXI, figs. 10a and b. 



Empo lisbonensis Stewart, Kans. Univ. Quart., vol. vin. 



This >pecies was established on the left palatine of a single 

 individual from the Lisbon shales, Fort Pierre Cretaceous. 

 The specimen was found by myself one mile northeast of Lisbon, 

 Logan county, Kansas, and is in a fair state of preservation. 

 It indicates a fish of about the size of E. nepaeolica Cope. The 

 catalogue number of the specimen is 328. 



The palatine is much more depressed than in the specios just 

 mentioned, but is broader across the alveolar portion, giving 

 the bone a very robust appearance when seen from below. The 

 anterior extremity was probably not so acutely pointed as in 

 the other species of this genus. None of the teetli are preserved 

 complete, but there are alveoli present which show that there 

 was an outer row of large teeth and an inner row of small ours. 

 The outer row are reduced in size toward the distal extremity, 

 and may entirely disappear before the end is reached, as there 

 are no tooth scars on this portion. At the posterior end of the 



