EOCENE FISHES. 
41 
Width of inferior rib of do. at middle. . 0. OOG 
^ vertical.... 0. 012 
Diameter of more posterior dorsal transverse. 0.015 
longitudinal. 0.010 
Depth of ganoid area of a scale... 0.014 
Length of ganoid area of a scale.. 0. 020 
Thickness of the same at the middle.... 0. 0045 
Width between posterior bases of exoccipitals. 0.0085 
Clastes integer, Cope. 
Plate xxiv, figs. 1-16. 
Gar, Cope, Ann. Eeport Chief Engineers, 1874, p. 592. 
This species of Fish is represented by remains similar to those of the 
last, i. e., by cranial bones, vertebrae, and scales. The characters of the 
surfaces of the first and last-named parts do not differ from those of C. 
aganus, but the vertebrae jiresent peculiar features. The inferior face of the 
first vertebra is more deeply excavated than in that species. The inferior 
face of the centrum is not marked with the deep median groove so char¬ 
acteristic of the corresponding, and indeed of all the dorsal vertebrae of C. 
aganus, being smooth and entire. The lower part of the margin of the 
concave and convex articular faces of the centrum of the same vertebra is 
not excavated on each side, and these borders are nearly straight. In a 
second and smaller specimen, the inferior face is also entire, and the articu¬ 
lar faces are subcordiform and regularly contracted below. The grooves 
of the inferior surface continue throughout the length of the column in the 
existing Lepidosteus of the Ohio. 
The caudal vertebra) of the C. integer present the usual characters of the 
recent species. They have a narrow lateral rib and broad decurved para- 
pophyses; the inferior surface has two narrow approximated ridges, inclos¬ 
ing a longitudinal pit with the parapophysis. 
The scales are generally smooth, but a few near the ? scapular arch are 
marked with longitudinal linear interruptions of the ganoine. 
Length of first dorsal......... 0. 008 
Depth at middle.. 0.011 
Width of centrum......... 0. 02G 
Length of a median dorsal..... 0.015 
