TO 
Catalogue of Fossil Vertebrata of North America the genus is placed 
in Mugilidæ, but A. S. Woodward shows that it belongs to a different, 
extinct, family. 
Asineops squamifrons Cope. (Asineopide.) 
Eocene. Green River, Wyoming. 
Scales cycloid, with about six wavy or crinkled circuli across api- 
cal marginal area, continuous at sides with the lateral circuli, but cutt- 
ing the other circuli abruptly (see figure); middle apical circuli very 
strongly angularly bent, and more or less angles practically to nucleus; 
circuli regular and rather coarse; apparently no radii, certainly no api- 
cal ones. In latinucleate (regenerated) scales the whole apical field has 
transverse crinkled circuli; but the other condition, as figured, is nor- 
mal, and was clearly seen in very many scales. 
The type of A. pauciradiatus Cope was examined, but the scales. 
were not distinct; they looked as if they might be different. 
The scales are totally different from those of the modern Aphre- 
doderus, and Cope was evidently right in placing Asineops is a distinct 
family. The wavy apical circuli resemble those of Gerride, but the 
rest of the scale is wholly different. 
Oligoplarchus squamipinnis Cope. (Percoidea.) 
Tertiary. South Dakota. 
About nine very strong basal radii; apical circuli coarse, right 
across scale, rounded, not angled; some fine longitudinal striz at sides 
of apex may indicate remnants of a ctenoid area. 
The scale agrees with those of the Centrarchide. 
Plioplarchus septemspinosus Cope. (Percoidea.) 
No. 4997. (Tertiary; Oregon.) 
Subquadrate scale of the usual Percoid type; about 13 spreading 
fan-like basal radii; sides with very fine circuli of ordinary type; circuli 
over nuclear region coarser, forming flattened arches, transverse in 
middle; apical area of the typical acanthopterygian type, but could not 
see the marginal teeth. The type of Plioplarchus is a much smaller fish, 
with many scales scattered all around it. These show about ten basal 
radii, and long sharp apical teeth. The scales may be compared with 
