ORDER II. BONY FISHES. —MALACOPTERYGII ABDOMINALES. 175 
is about fourteen inches in length, color dark brown above, yellowish on the 
sides, and white beneath ; scales large, with golden reflections. The pectoral 
fins are reddish, tipped with brown, and the ventrals are of the same color. 
But the distinguishing characteristic of the species is its tuberculated or 
horned snout. 
C. Gibbosus. —The Gibbous Sucker, This species was discovered by 
Le Sueur, in the Connecticut River, and he thus describes it : — 
“Back elevated in front of the dorsal fin, which is almost as high as 
broad, and rounded ; anal fin bilobated ; head nearly as high as lone; snout 
short, roundish ; tail straight; caudal fin semi-lunated ; lobes roundish, the 
inferior one longer than the upper. The color of the back is a deep blue, 
with golden reflections; pectoral, ventral, and anal fins of a fine reddish 
orange color; caudal fin tinted with carmine and violet ; dorsal fin bluish- 
green; abdominal scales red at their base ; lateral line hardly perceptible ; 
body marked with four or five faint transverse bands. Length of the speci- 
men, eleven inches.” 
This is a beautiful fish, but must be very rare, as I have never met with 
it in the rivers of Maine or New Hampshire. 
C. Nigricans. — The Black Sucker. Iam tempted here to introduce Dr. 
Storer’s excellent description of this species. The specimen here described 
was about fifteen inches in length. 
“© Color of the back, black; sides reddish-yellow, with black blotches ; 
beneath, white, with golden reflections. Scales moderate in size. Head 
quadrangular, one fifth the length of the fish; top of the head of a deeper 
black than the body. Eyes moderate, oblong ; pupils black; irides golden. 
Mouth large; corrugations of the lips very large, particularly those of the 
lower lip. The lateral line, arising back of the operculum, on a line oppo- 
site the centre of the eye, makes a very slight curve downwards, and then 
pursues nearly a straight course to the tail; it is composed of sixty scales. 
Back, between the head and dorsal fin, rounded. The pectoral, ventral, 
and anal fins are reddish. The caudal and dorsal blackish. The dorsal fin 
in height is equal to two thirds its leneth. The third and fourth rays of 
the anal fin, which are longest, extend a little on to the rays of the 
caudal fin. 
“Tn two of the eight specimens examined, there were but twelve rays in 
the dorsal fin. 
“Tn larger specimens than that just described, the back is not black, but, 
together with the sides, is of an olive-brown color; in others, again, the 
back is neither black nor olive-brown, but reddish, like the sides. In some 
specimens, a longitudinal band, of a deeper red than the rest of the side, runs 
the whole length of the fish, just beneath the dark-colored back. The 
