DESCRIPTION OF A NEW DARTER FROM MARYLAND. 
By LEWIS RADCLIFFE and WILLIAM W. WELSH. 
There are about 15 known species of darters belonging to the genus Hadropterus. 
Of these only two (//. peltatiis and roanoka) have been reported east of the Alleghenies 
and north of the Carolinas. In North Carolina, H. evides, which is common west of tiie 
Alleghenies, here occurs on the Atlantic slope. The range of H. nigrofasciatus extends 
from South Carolina to Louisiana. The remaining species are found in the Mississippi 
Basin, Great Lakes, and southwestern streams. The members of this genus are active, 
graceful, and usually of brilliant coloration. 
The examples of the new species herein described were seined in Swan Creek, near 
Havre de Grace, Md., in water 6 inches deep, on a long, stony riffle, where the bottom 
was comparatively free from bowlders and the current so swift that one would not have 
expected to find fishes of any kind. 
Hadropterus sellaris, new species. 
Dorsal xi-ii,i; anal pectoral 14; scales 5+6-46 (+3). 
Head 3.66, considerably broader than deep, parietal region rather depressed; body slender, fusi- 
form, not markedly compressed, greatest depth 5.09; caudal peduncle slender, as long as head, its depth 
2.75 in its length, eye 3.67, subcircular, dorso-lateral ; snout 3.14; interorbital very narrow, 2.4 in diam- 
eter of eye; mouth rather wide, terminal, lower jaw included, maxillary 2.82, reaching nearly to vertical 
from anterior margin of pupil, premaxillaries not protractile, the broad frenum connecting them with 
the skin of the forehead without groove; teeth small, vomerine and palatine teeth present. 
Spinous dorsal low, fourth spine longest, 2.20 in head; second dorsal somewhat higher, second ray 
longest, 1.80, distal edge of caudal emarginate, anal low, sixth ray longest, 1.83; ventrals 1.21, rather 
widely separated at base, tips of spine and anterior rays expanded, adipose, pectorals broad, slightly 
longer than head, reaching to behind the vent, tips of lower rays expanded, adipose. 
Opercle and cheeks to below middle of eye scaled, rest of headnaked, back in front of dorsal, breast, 
and belly naked, scales large, regular in arrangement, about as deep as long, the free portion with a 
submarginal row of well-developed spinules; lateral line nearly straight, not arched anteriorly. 
Color in alcohol: Ground color light smoke-gray, becoming white on ventral surface; back crossed 
by four black saddles with light margins, broadest dorsally, narrower than interspaces, the first extending 
across back in front of spinous dorsal downward to base of pectoral, the second, lying between base of 
next to last dorsal spine and origin of second dorsal, extends downward and forward below lateral line; 
the third, from sixth to last dorsal ray, extends downward and forward to within two scales of base of 
anal; the fourth, crossing back in front of base of caudal, extends downward and slightly forward to 
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