192 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
base of caudal ; top of bead and vertebral line golden. Snout tubercu- 
late in males. Head 4^~ ; depth 5. D. 8 ; A. 8 ; scales 5-37-3 ; teeth 
4-4, 2. L. 2 J inches. Alabama Basin ; very abundant in clear streams. 
A graceful little fish. 
( Ilybopsis chrosomns Jordan, Ann. Lyc. Nat. Hist. N. Y. 1876, 333: Rydrophlox chrosomua 
Jordan & Bray ton, 1. c. 49.) 
271. M. xaeaoceplialHS Jordan. 
Body rather short and deep, with thick caudal peduncle ; back wide, 
not elevated. Ilead large, flattish and broad above, the snout rounded. 
Mouth large, oblique, the jaws nearly equal. Eye very large, 2f in 
head. Lateral line somewhat decurved. Thirteen scales in front of the 
dorsal. Dorsal fin slightly behind ventrals. Dark olivaceous above, the 
scales being extensively dark -edged ; a dark band along the sides of the 
caudal peduncle, which vanishes in black points along the sides of the 
body, reappearing on the head and passing around the snout ; a dusky 
blotch at base of caudal. Males without red markings, the snout swollen 
and tuberculate in the spring. Head 4i; depths. D. 85 A. 7 ; scales 
5-38-3 5 teeth 2, 4-4, 2. L. 2f inches. Georgia to Mississippi. 
(Uybopsis xainocepbalus Jordan, Ann. Lyc. Nat. Hist. N. Y. 1876, 334.) 
272. JW. pliimbeoBtis (Cope) J. & G. 
Body oblong, compressed, the back somewhat arched. Mouth oblique, 
the lower jaw slightly longer than the upper. Fins short. Eye large, 
2| in head. Silvery, with bluish reflection ; top of head dusky ; a dark 
spot at base of caudal. Ilead 4^ ; depth 4§. D. 8 ; A. 9 ; scales 0-39-3 j 
teeth 2, 4-4, 2. L. 3 inches. Saginaw Biver. {Cope.) 
{Alburnops plumbeolus Cope, Proc. Acad. Nat. Sci. Phila. 1864, 282.) 
273. M. lacerfosiis (Cope) J. & G. 
Body stout. Head hroad and deep. Mouth wide, the lower jaw pro- 
jecting. Eye large, 3J in head, equal to muzzle and to width of inter- 
orbital space. Maxillary not reaching the line of the orbit. Scales 
large, only 5 above the lateral line. Silvery ; dorsal region dusky ; no 
red. Head 4. Teeth 2, 4-4, 2. L. 4.1 inches. Headwaters of Tennes- 
see River. {Cope.) 
( Hyhopsis laeertosiis Cope, Journ. Acad. Nat. Sci. Phila. 1868, 232.) 
274. ITI. sltumardi (Grd.) Jor. & Gilb, 
Bodj^ moderately elongate. Snout subconical, not strongly decurved. 
Mouth rather large, oblique, the lower jaw included, maxillary reach- 
ing front of eye, upper lip above the level of the lower border of eye. 
Dorsal over ventrals. Eye large, 3^ in head. Olivaceous j sides silveryj 
