16G CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
spot; a dark spot near tlie base of tbe dorsal in front, as in Ilyhorlujn- 
cJius, Head deptb 5. H. 8; A., i ; scales 7—44—4; teetb 4—4, little 
booked. L. 3 inches. Michigan to Indiana. 
(Rilbopsis tiiditanus Cope, Trans. Amer. Phil. Soc. Phila. 1836, 381: Leudscus tuditanus 
Giiuther, vii, 259.) 
C. txioiirocei>BaaBa, (Hay) J. & G. — Bull-head Minnow. 
Body stoat, somewhat compressed, broad and flat above, with deep 
caudal peduncle. Head broad and flat above, with an angle at the 
temporal region. Muzzle broad and obtuse, less truncate than in Sy- 
horhynchus notatus. Mouth rather small, horizontal, terminal, the jaws 
about equal, maxillary not reaching to opposite anterior margin of eye. 
Eye large, 3-1 in head. Dorsal inserted above ventrals, nearer snout 
than caudal. Scales before dorsal small, in about 137 series. Dusky 
yellowish; sides silvery, with an obsolete dark lateral band, which tei- 
minates in a black spot ; a black spot on anterior rays of dorsal fin. 
Depth 4.J; head 4^. D. 8; A. 7 ; scales 8-43-4; teeth 4-4, with giiud- 
iug surface. L. 3 inches. Ohickasawha River, Mississippi. 
{Alburnops tauroce})halus Hay, Proc. U. S. Nat. Mus. 1880, 503.) 
20fl. C. lascEsaalMra (Cope) J. & G. 
Head moderate, tlie muzzle little obUise. Mouth larger, teiminal, 
oblique, the maxillary reaching the orbit. Eye 3J in head; temporal 
region rounded. Scales rather small, 21 rows in front of the dorsal. 
Lateral line slightly decurved. Plumbeous above; head blackish; a 
faint dusky lateral baud, ending in a dusky spot at root of caudal fin; 
caudal fin dull red; fins otherwise plain. Head 4; depth 4|-. D. 8; 
A. 7; scales 7-44-4; teeth 4-4, little hooked. L. 3 inches. Michigan 
to Illinois; not very common. ** 
{Ilpbopsis hannaturus Cope, Cypr. Peuu. 382, 1866: Leudscus hwmaturus Giiutlier, vii, 
259.) 
aa. Scales in the lateral line 32-37. 
205. C. SE>ecBa’MBacHJa. (Cope) J. G. 
Body elongate. Head large and rather flat, nearly as broad as deep 
Eye large, 3 in head. Muzzle remarkably thick. Mouth slightly ob- 
lique, the maxillary reaching the eye. Fifteen rows of scales in front of 
dorsal. Olivaceous, silvery white below; a leaden band along the sides 
and a conspicuous black spot at base of caudal ; head dusky ; margins 
of scales above lateral line, as well as bases of dorsal and anal fins, 
blackish; pectorals, ventrals, dorsal, aud anal more or less orange in 
