972 FISHES—PERCID 2. 
140. ALVORDIUS MACROCEPHALUS (Cope) Jordan. 
Hitheostoma macrocephalum, Cork, Trans. Amer. Philos. Soc. Phila., 1866, 401. 
Alvordius macrocephalus, JORDAN, Man. Vert., 2d Ed., 1678, 220. 
Description. Body elongate; head long, eel-like; mouth rather large, maxillary 
reaching to opposite anterior margin of orbit; eye shorter than snout, 44 in head; ven- 
tral shields twice as long as other scales; cheeks, opercles, neck, and chest without 
scales; color light brown, with a slightly undulating whitish band from upper angle of 
opercle to caudal peduncle; back with dark quadrate spots; sides with nine blackish 
longitudinal spots, alternating with smaller ones; streaks downward and forward from — 
the eye; vertical fins somewhat barred; spinous dorsal with a median blackish band; © 
head spotted above; head 34; depth 7; D. XV, 13; A. II, 11; scales 11-77-15. Length 
3 inches, 
Habitat, Ohio Valley. The known specimens are all from Western Pennsylvania. 
Diagnosis.—This species is distinguished from its relatives by its very 
large, naked head. 
_Habits.— Nothing distinctive known. 
141. AtLvyorpius pHoxocEPHALUS (Nelson) Jordan. 
Etheostoma phoxocephalum, NELSON, Bull. Ills. Mus. Nat. Hist., i, 1876, 55. 
Alwordius phoxocephalus, JORDAN, Proc. Acad. Nat. Sci. Phila., 1877, 50; Man. Vert., 2d 
Ed., 1878, 221, and elsewhere. an 
Description.—Body rather slender, compressed; head . extremely long, narrow, and 
tapering, the snout very acuminate; mouth large, the maxillary reaching to the eye ; 
the lower jaw unusually narrow and long, scarcely shorter than upper ; eye about equal 
to snout, 44 in head; cheeks, opercles, and neck with small scales; chest naked; color 
yellowish brown, somewhat as in A. aspro, but the lateral spots smaller and more num- 
erous, scarcely twice the size of the eye, quadrate in form; a small blackish spot at each 
end of the lateral line; head 4; depth 54; D XII, 13; A. II, 9; scales 12-68-14, 
Length 3 inches. 
Habitat, Indiana (White River) to Tennessee and Kansas; not very abundant; not 
yet noticed in Ohio. 
Diagnosis.—Distinguished from the other species of the genus by the 
long, slender head. 
Habits —This species is found in clear, gravelly rivers; it has not yet 
been noticed in Ohio, but doubtless occurs in the Southwestern part of 
the State. 
142. Atvorpius Aspro Cope and Jordan. 
Biack=-sided Darter. 
Etheostoma blennioides, KIRTLAND, Bost. Journ. Nat Hist., iii, 1841, 348, not of Rafinesque. 
—VAILLANT, Kecherches sur Etheost., 1873, 54, and of many writers. 
Alvordius aspro, COPE and JORDAN, Proc. Acad. Nat. Sci. Phila., 1877, 51.-JORDAN, Man. 
Vert., 3d Ed., 1880, 220. 
