280 KANSAS UNIVERSITY SCIENCE BULLETIN. 



ward and bent, during interment, back against the stomach. 

 There are eleven rays preserved. The anterior rays are cross 

 segmented with long divisions, which measure 7 mm. in 

 length in the second ray. The square notches mentioned by 

 Hay (11, Y>.S7) as occurring on the specimen of Empo nepaho- 

 lica Cope in the United States National Museum, are entirely 

 lacking from that portion of the anterior ray which is pre- 

 served in the present specimen. The teeth on the edge are 

 also absent, nor do I find that they are evident in Cope's figure 

 referred to by Hay. The figure is very indistinct, and if the 

 notches were present they could not, in the nature of the case, 

 be normal, but would represent places where the segments had 

 dropped out. The first ray is not a spine. In other respects 

 the present specimen agrees well with- that figured by Cope 

 on plate LH, figure 1 (Cretaceous Vertebrata). The fifth and 

 succeeding rays are segmented like the anterior ones, but the 

 segments are smaller and measure, on the average, only about 

 2 mm. The seventh ray is especially broad, equaling in its 

 proportions two and one-half of the other rays. All of the 

 rays are split distally. The seventh divides into four second- 

 ary rays and the divisions ascend more and more to the base of 

 the fin posteriorly. The fin supports are obscured by scales 

 and matrix so that their nature cannot be determined. On 

 the opposite side of the specimen, below the pectoral fin, there 

 are large scales and fragments of ribs. 



The second intestinal enlargement is interesting, entomo- 

 logically, as showing the borings of some fossorial hymenop- 

 teron; possibly some one of the smaller species of the 

 Andrenidse. There are fragments of pupa cases in the burrows, 

 so there is no doubt as to the recent origin of the holes. 



The present specimen is so far the only remains known of 

 the soft anatomy of the Kansas Cretaceous fishes, and, so far 

 as I can learn, the first indication of the alimentary canal of 

 Cretaceous bony fishes of any region. Whether the stomach 

 and intestines in their various forms will ever be of any help 

 in determining the relationship of the various osseous fishes 

 remains to be determined. It is to be feared, however, that 

 the fishes have been so diversified according to food habits that 

 these structures will not be of any great phylogenetic value. 

 The remains are interesting, however, as indicating, in a 

 measure, the habits of life of at least one of the Cretaceous 

 fishes. 



