968 FISHES — PEECID^. 



Dipleaium blmnioides, Jordan, Man. Vert., Ist Ed., 1876, 223. — Jordan and Copeland, 



Amer. Nat., 1876, 339, and iit numerous recent papers. 

 Hyostoma newmani, Agassiz, Amer. Journ. Sci. Aits, 1854, 305. 

 Peleoma cymatogramma, Abbott, Proo. Acad. Nat. Sci. Phila., 1860, 327. 

 Syostoma cymatogrammum, Cope, Journ. Acad. Nat Sci., 1868, 214. 

 Hyosioma hlennioperca, 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 belly large, cycloid, not 

 caducous ; cheeks with fine scales ; operoles 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 aire 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 4^; depth 4| ; 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. 



Genus 74. IMOSTOMA, Jordan. 



Imoetoma, Jordan, Proc. Acad. Nat. Sci. Phila , 1877, 49. 

 Type, Sadropterua ahumardi, Grd. 

 Etymology, eimi, to move ; stoma, mouth. 



Body stout and heavy forwards ; head broad 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 li^je ; 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. Imostoma shdmaew (Girard) Jordan. 



Hadropterus shumardi, Girard, Proc. Acad. Nat. Sci. Phila., 1859, 100. 

 Imostoma shumardi, Jordan, Proc. Acad. Nat. Sci. Phila., 1877, 49 ; Man. Vert., 2d Ed., 

 1878, 222, and elsewhere. 



