PERCIDA. 95 
Color usually pale olivaceous, much tessellated above; sides with numerous 
small W-shaped, dark blotches. Males in breeding season heavily pig- 
mented, especially anteriorly, with blue-black. A black line forward and 
downward from eye. Fins barred. Length 2 to 2% inches. 
The little Johnny Darter is found all over Ohio, and is usually 
quite abundant. It inhabits lakes and rivers on sandy bottom, 
the clear creeks of Ohio are favorite abiding places, and every 
small brook and spring run large enough to contain any fish at 
all will be found to have its quota of ‘‘ Johnnies.’’ Hamilton 
County, ‘‘common in Little Miami river,’’ Henshall, 1888 ; Lorain 
County, ‘‘ very common everywhere, one of the few species that 
may be depended upon when the seine is drawn,’’ McCormick, 
1892; Maumee river system, common everywhere, Kirsch, 1893 ; 
Franklin County, taken in every stream, abundant, April 3rd 
given as a breeding date, Williamson and Osburn, 1897; Big 
Jelloway creek system, abundant in every stream, Parker, Wil- 
liamson and Osburn, 1898; John’s creek at Waterloo, Huron 
river at Milan, Sandusky Bay, Ashtabula creek, Wabash river at 
Celina, Stillwater and Wolf creeks at Dayton, North Fork of 
Licking river at Newark, R. C. Osburn, 1899; Niggermill Run 
and Mahoning river, E. B. Williamson, 1900; Pippin lake, Chip- 
pewa lake, Summit lake, Cuyahoga river at Kent and Hawkins, 
Breakneck creek at Kent, Grand river at Painesville, Chagrin 
river at Willoughby, Wheeling creek at Bridgeport, Ohio river 
and McMahon creek at Bellaire, Licking reservoir, R. C. Osburn, 
1900. 
Genus: CRYSTALLARIA. 
Crystallaria asprella (Jordan). 
Head 41 to 4%; depth 7 to 8. D. XII to XIV-13 to 15; A. I, 12 to 14; 
scales 7 to 10-98 to 100-10. Body long and slender. Head long and slender; 
eye large; mouth not large, subterminal; premaxillaries not protractile; 
opercular spine well developed. Cheeks and opercles with pectinate scales; 
throat and belly naked, space between ventrals scaled. Color translucent 
olive, pellucid in life; with 3 or 4 more or less distinct, dark cross bands on 
back and sides; a dark lateral band made up of about Io more or less con- 
fluent blotches. Length 5 or 6 inches, 
