398 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The color pattern suggests an intermediate type between Percina caprodes and Hadropterus aspro; 
side with about 19 large, distinct black blotches, which, especially along the middle region, are alter- 
nately larger and smaller, these often being the ventral ends of more or less well-developed trans- 
verse bars; dorsal side with a series of large quadrate blotches alternating and anastomosing with 
variously developed transverse bars; color pattern of the transverse type rather than the longitudinal 
characteristic of II. aspro and II. macrocephalnm. In the older individual this dorsal pattern becomes 
more diffuse and less regular; dorsal two-thirds of opercle and upper part of cheek black; a distinct 
black band extending downward and another, more diffuse, forward from the eye; both dorsals and 
caudal fin barred; pectoral indistinctly barred; ventrals and anal plain; a black spot at base of caudal. 
Table of measurements and counts of all the specimens f 
No. of 
specimen. 
Length 
of 
body. 
Head 
in 
length. 
Depth 
in 
length. 
Eye 
in 
head . 
Snout 
in 
head. 
Maxil- 
lary 
in 
head. 
Inter- 
orbital 
in 
head. 
Pec- 
toral 
in 
head . 
Ven- 
trals 
in 
head. 
Spi- 
nous 
dorsal 
from 
snout. 
Soft- 
dorsal 
from 
snout. 
Anal 
from 
snout. 
Dorsal 
fin. 
Anal 
fin. 
Scales. 
1 
min. 
77. 00 
4.05 
6. 10 
3.80 
3. 95 
3.58 
4. 63 
1.36 
1.31 
3.20 
1.60 
1.64 
XVI, 14 
n,n 
8-79-9 
2 
49. 00 
3.82 
7.00 
3. 65 
4.00 
3. 65 
5.13 
1.28 
1.42 
2.88 
1.58 
1.58 
XIV, 14 
11,10 
9-94-12 
8 
50. 00 
3.84 
(i. 25 
3.42 
3. 82 
3.71 
5. 20 
1.30 
1.32 
2.92 
1.66 
1.61 
XV, 14 
11,10 
9-84-il 
4 
55. 00 
3. 93 
0. 11 
3. 79 
4. 66 
4. 66 
4. 66 
1.21 
1.40 
3.23 
1.57 
1.62 
XIV, 13 
11,11 
8-82-1 1 
5 
49. 00 
3.92 
0. 30 
3.90 
4. 17 
4.17 
4.17 
1. 56 
1.39 
3. 06 
1.58 
1.58 
XIV, 15 
11,11 
9-82-12 
6 
51. 00 
3.92 
4. 30 
4.33 
4. 23 
5.20 
1.30 
1.44 
3.18 
1.58 
1.59 
XIV, 13 
11,11 
8-84-11 
Average . 
3. 91 
6. 36 
3.81 
4. 14 
4. 00 
4.83 
1.33 
1.38 
3.08 
1.59 
1.60 
82 
The species is most closely related to Hadropterus aspro and Hadropterus macroceplialum. From 
the former it differs most strikingly in the color pattern, especially that of the dorsal side, which is 
transverse in type rather than longitudinal, and in the greater number of scales, which in this species 
are ctenoid instead of cycloid, on the cheeks and opercles. 
Type, No. 9785, Museum Indiana University; cotype, No. 978(5, Museum Indiana University; 
cotvpe, No. 50834, U. S. National Museum; cotype, No. 2742, U. S. Fish Commission; cotypes have 
also been deposited in the British Museum of Natural History and in the Museum of Leland Stanford 
Junior University. 
The drawing was made from the largest specimen, which is taken as the type. This lias an 
unusual number of dorsal spines, 16, as will be seen from the table of counts. 
