968 FISHES—PERCIDA. 
Diplesium blennioides, JORDAN, Man. Vert., Ist Ed., 1876, 223.—JoRDAN and COPELAND, 
Amer. Nat., 1876, 339, and in numerous recent papers. 
Hyostoma newmani, AGassiz, Amer. Journ. Sci. Arts, 1854, 305. 
Peleoma cymatogramma, ABBOTT, Proc. Acad. Nat. Sci. Phila., 1860, 327. 
Hyostoma cymatogrammum, Cope, Journ. Acad. Nat Sci., 1868, 214. 
Hyosioma blennioperca, CoPE, Journ. Acad. Nat. Sci. Phila., 1868,.214. 
Description.—-Body stout, elongate, little compressed ; profile very convex; eyes large, 
high up and close together, a transverse depression at the nape and a longitudinal fur- 
row between the eyes; mouth small, horizontal, quite inferior ; upper jaw concealed in 
a furrow under the snout; scales moderate, those on the beily large, cycloid, not 
caducous; cheeks with fine scales; opercles with large ones; neck scaly; chest naked ; 
anal papilla very large; anal spines strong; caudal fin emarginate; lower rays of the 
pectorals, and rays of the ventrals and anal enlarged and fleshy in the males; color 
olive green, tessellated above; sides with about eight double transverse bars, each pair 
forming a Y-shaped figure. These are joined above, forming a sort of wavy, lateral 
band. In life these markings are of a clear, deep green; sides sprinkled with orange 
dots; head with olive stripes and the usual dark bars; first dorsal dark orange brown 
at base, blue above, becoming pale at tip; second dorsal and anal of a rich blue green, 
with some reddish; caudal greenish, faintly barred; young and female specimens are 
more or less dull, but the pattern is peculiar; head 44; depth 42; D. XIII, 13; A. II, 8; 
Lat. 1. 65-78. Length 3 to 5 inches. 
Habitat, all streams of the central basin from Virginia to Alabama, Minnesota, and 
Kansas. Abundant in all gravelly streams in Ohio. 
Diagnosis.—This species may be known by its very blunt head and 
small, inferior mouth. 
Habits.—Its habits are essentially like those of the species of Boleosoma. 
It is a delicate species, perishing at once in foul water. 7 
GENUS 74. IMOSTOMA. Jordan. 
Imostoma, JORDAN, Proc. Acad. Nat. Sci. Phila,, 1877, 49. 
Type, Hadropterus shumardi, Grd. u 
Etymology, eimi, to move; stoma, mouth. 
Body stout and heavy forwards; head bread and blunt; mouth broad, the lower jaw 
included ; upper jaw protractile ; vomerine teeth present ; sides of the head scaly ; body 
covered with rather large scales, 56 in the lateral line; no enlarged ventral plates, the 
posterior part of the abdomen scaled like the sides, the anterior part with a naked 
strip ; lateral line continuous; dorsal fins large, the first larger than the second, of ten 
spines; anal fin large, in male specimens greatly prolonged, reaching the caudal; anal 
spines two, the first the larger; dorsal formula X, 15; anal II, 11; pattern of coloration 
not well defined, dark blotches on a lighter ground. But one species is known. 
136. Imosroma sHUMARDI (Girard) Jordan. 
Hadropterus shumardi, GIRARD, Proc. Acad. Nat. Sci. Phila., 1859, 100. 
Imostoma shumardi, JORDAN, Proc. Acad. Nat. Sei. Phila., 1877, 49; Man. Vert., 2d Ed., 
1878, 222, and elsewhere. 
