GILDED DARTER. 975 
not protractile; vomerine teeth very feeble or wanting; scales large; gill-membranes 
broadly connected, no enlarged ventral plates; lateral line complete; dorsals well sep- 
arated, the second much larger than anal, higher and shorter than spinous dorsal ; dor- 
sal spines about ten; anal spines two. 
This genus is mainly distinguished from Nothonotus by the broad union 
of the gill-membranes. 
145. NANosroMA ZONALE (Cope) Jordan. 
_ Poecilichthys zonalis, Corr, Journ. Acad. Nat. Sci. Phila., 1868, 212, tab. 24, f. 1. (male), 
Nanostoma zonalis, JORDAN, Bull. U. S. Nat. Mus., x, 1877, 15, and elsewhere. 
Nanostoma vinetipes, JORDAN, Proc. U. S. Nat. Mus , 1879 (female) 
Description.—Body slender, somewhat compressed; head small, rather short; the 
mouth small, subinferier; snout decurved, rather obtuse, maxillary not reaching front 
of eye; cheeks, opercles, neck, and throat closely scaled ; eye rather large; teeth very 
feeble, those on the vomer not evident, probably none on the palatines; first dorsal 
well developed, separated from the second, which is higher and shorter than the spinous 
dorsal, and considerably larger than the anal; caudal emarginate; bright olivaceous 
above, golden below; six dark brown quadrats dorsal spots, which connect by alter- 
nating spots with a broad, brown lateral band, from which eight narrower dark-bluish 
bands more or less completely encircle the belly; paired, anal, and cauda! fins. golden, 
brown-spotted ; middle half of the first dorsal crimson; a series of round, crimson spots 
near the base of the second dorsal; occiput, a band on muzzle and one below eye black ; 
a black spot on operculum and one at base of pectorals; females duller and speckled; 
the ventrals barred ; the lateral bars feebler; head 44; depth 5; D. XI, 12; A II, 7; 
scales 11-50-12. Length 23‘inches. . 
Habitat, Ohio and Upper Mississippi Valleys, widely diffused but not generally 
abundant, 
Habits.— Nothing distinctive known. 
146. NANOSTOMA TESSELLATUM Jordan. 
Hadropierus tessellatus, JORDAN, Bull. U.S. Nat. Mus, x, 1877, 7. 
Description.—Coler olivaceous, the markings obliterated in the type; body fusiform; 
head broad and heavy, entirely naked; neck scaly; mouth moderate, horizontal, the 
lower jaw included, the maxillary extending to opposite front of eye; anal higher than 
second dorsal, but not so long, its spines strong; gill-membranes broadly united; D. X, 
12; A. Il, 8; Lat. 1.48. Length 24 inches. 
This species is known only from one specimen, in poor condition, 
taken in the Alleghany River, at Foxburg, Pennsylvania. 
GENUS 79. NOTHONOTUS. Agassiz. 
Nothonotus, AGassiz, Bull. Mus. Comp. Zool., i, 1863, 3. 
Type, Ltheostoma maculata, KIRTLAND. 
Etymology, nothos, prominent; notes, back, from the high dorsal fins. 
