234 
BULLETIN OF THE UNITED STATES FISII COMMISSION. 
35. Notropis jejunus (Forbes). Cedar Rapids, rare. Head, 4 in length of the body ; depth, 4| to 4J; 
body robust; snout bluntisb; mouth a little oblique; dorsal (origin of first ray) nearer tip 
of snout than base of caudal fin ; 14 or 15 scales before the dorsal ; scales in the lateral line, 
36 or 37 ; diameter of the eye equal to the length of the snout ; 34 in the length of the head ; 
anal rays, 6 or 7, usually 7 ; lateral line slightly decurved. As regards form and color this 
species very much resembles H. nuchalis Agassiz. 
36. Notropis ardens (Cope). 1 ledfin. Indian Creek, common; scales, 43 to 49; anal rays, 11 or 12; 
depth, 3f to 4f; the larger specimens are the deeper; occasionally one is found whose 
depth is 5. Dumont, not common; scales, 45 to 48; anal rays, 10 or 11. Prairie Creek, 
Waverly (Skellrock River), and Palo, rare. Austin, rare; scales, 42 to 49. This species is 
rather rare in Iowa. It is very variable and seems to vary greatly with age. The smaller 
specimens are light-colored and slender, the larger .very dark. The number of scales in the 
lateral line vary much. The dark at the base of the dorsal fin is always present, but in 
some specimens it is more distinct than in others. 
37. Notropis dilectus (Girard). Emerald minnow. Waverly (Cedar River); head, 44; depth, 54; 
specimens rather darker than usual. Austin (Minnesota) and Waverly (Shellrock River), 
common; Indian Creek and West Liberty, rare; Dumont, common. Diameter of eye equals 
the length of the snout, 34 in the head. Cedar Rapids, common; head, 44 ; depth, 4f; scales 
in the lateral line, 38 ; dorsal midway between the pupil and base of caudal fin ; anal rays, 
10 or 11. 
38. Notropis atherinoides Rafinesque. Waverly (Shellrock River), rare; some specimens are very 
slender. Indian Creek, common ; the longest specimens are 34 inches in length ; anal 
rays, 9 to 11, usually 10 ; base of first dorsal ray midway between base of caudal fin and eye ; 
18 to 20 scales before dorsal fin; eye 34, equal to the snout; mouth large; maxillary reach- 
ing past the front of the orbit; snout pointed; lower jaw slightly the longer; scales in 
lateral line, 40 to 43. Cedar Rapids, common. These specimens agree with the above. The 
body is usually deeper than in N. dilectus; sides with a broad plumbeous band. This species 
is closely related to the preceding. 
39. Phenacobius mirabilis (Girard). Indian Creek, West Liberty, Palo, and Cedar Rapids, rare. 
40. Rhinichthys atronasus (Mitchill). Black-nosed dace. Palo and Mount Yern on, rare. 
41. Hybopsis dissimilis (Kirtland). Cedar Rapids and Waverly (Shellrock River), rare. Waverly 
(Cedar River), common. Near the shore in shallow water many specimens were taken, but 
none were obtained from other points in the stream. 
42. Hybopsis storerianus (Kirtland). Prairie Creek, rare. 
43. Hybopsis kentuckiensis (Rafinesque). Hornyliead ; River chub; Jerker. Waverly (Shellrock 
River) and Palo, common. Indian Creek, West Liberty, Waverly (Cedar River), Dumont, 
and Cedar Rapids, rare. 
44. Semotilus atromaculatus (Mitchill). Horned dace; Creek chub. Indian Creek, West Liberty, 
Palo, Dumont, Mount Yernon, and Cedar Rapids, rare. 
45. Leuciscus elongatus ? (Kirtland). Palo (Dry Creek). Only one specimen, measuring 44 inches in 
length was taken. Teeth, 5-5, slightly hooked at the tip, no grinding surface ; edges beveled, 
making a cutting edge. Body elongate, ( slender ; dorsal fin mid way between tip of snout and 
base of caudal fin ; mouth terminal, oblique, rather large, but smaller than in L. elongatus 
from Yellow River. Scales on anterior portion of the body smaller than rest of scales. 
About 35 scales in a series before dorsal fin ; lateral line decurved ; scales in the lateral line, 
54; dorsal fin above ventrals ; dorsal rays, 8 ; anal rays, 8 ; maxillary reaching to the front of 
the orbit. Diameter of eye nearly equal to length of snout, 4 in the head ; head, 3§.in length 
of body; depth, 4-). Color, plain olivaceous, lighter below; fins with a tinge of yellowish. 
46. Notemigonus chrysoleucus (Mitchill). Golden shiner; Bream; Roach. Indian Creek, rare; 
anal rays, 13; dorsal, 8; scales in the lateral line, 41. West Liberty, Waverly (Shellrock 
River), Palo, Dumont, and Cedar Rapids, rare. 
47. Hiodon tergisus Le Sueur. Hoon-eye ; Toothed herring. Cedar Rapids, rare. 
48. Dorosoma cepedianum (Le Sueur). Gizzard shad ; Hickory shad ; Mud shad. Palo (Cedar River), 
one specimen taken from a bayou ; Cedar Rapids, rare. 
