252 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
A DESCRIPTION OF A NEW SPECIES OF HADROPTERUS (HADROP.- 
TEBUS SCIEBUS) FROM SOUTHERN INDIANA. 
By JOSEPH SWAIN. 
Hadropterus scierus, sp. nov. 
Head, 4 (44); depth, 5 (6); length of typical example, 3f inches. D. 
XIII, 14. <A.II,9. Scales, 7-65-11. 
Body robust, rather compressed behind. Head rather short; snout 
bluntish, 3$ in head. Mouth small, the lower jaw included. Maxillary 
not reaching the eye by about the width of the pupil.. Diameter of eye 
scarcely equal to length of snout, 45 in head. Gill membranes broadly 
connected. Lateral line straight, complete, not prolonged forward to 
the eye. Opercle covered with rather large scales ; cheeks with slightly 
smaller ones; a triangular area on the breast, in front of the ventral 
fins, with imbedded scales ; the breast otherwise almost naked; throat 
naked; scales persistent, on middle line of belly little enlarged, one 
enlarged plate being present between the ventral fins; body otherwise 
covered with rather small ctenoid scales. 
Fins all very large. The spinous dorsal separated from the soft dor- 
sal by the length of the snout. Outline of the spinous dorsal gently 
curved, the first spine one-third longer than last spine, and two-thirds 
length of middle spine, which is 13 in head. Base of soft dorsal longer 
than that of anal, its rays of about equal length, 12 in head; anal about 
as large as soft dorsal; ventrals about equal to pectorals, which are 14 
in head. 
Color in spirits, yellowish olive, everywhere vaguely blotched with 
black. Top of head, dorsal, anal, and ventral fins entirely black (proba- 
bly pale in the female). Base of pectoral and caudal fins, branchioste- 
gal membrane, cheeks, and sides posteriorly, blackish. Scales every- 
where finely punctulate with brown, the sides with a few larger black 
specks. 
This fish is known at present from only two specimens taken in Bean 
Blossom Creek, Monroe County, Indiana, about six miles north of 
Bloomington. The stream is a tributary of White River. 
This species differs from the others referred to Hadropterus in having 
the gillmembranes broadly united. In the arrangement given in Jor- 
dan & Gilbert’s Synopsis of the Fishes of North America it would, there- 
fore, stand as the type of a new genus. Itis, however, evidently closely 
related to Hadropterus nigrofasciatus, from which species it cannot prop- 
erly be generically separated. 
INDIANA UNIVERSITY, June 4, 1883. 
