ABRAMIS.—CAMPOSTOMA. 149 
5. ABRAMIS, Cuy., 1817. 
Abramis, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 249. 
Body ovate, compressed; abdomen behind the ventral fins compressed to form a keel. Mouth small, 
protractile; no barbels, Pharyngeal teeth compressed, hooked, in a single series, 5—5. Scales rather 
large; lateral line complete, decurved. Dorsal fin short, posterior to the ventrals; anal more or less 
clongate. 
Hight species in Europe and Western Asia and one in North America. 
1. Abramis chrysoleucus, Mitchell, 1814. 
Abramis chrysoleucus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 250'; Meek, Publ. 
Columbian Mus., Zool. v. 1904, p. 57”. 
Hab. Dakota and Nova Scotia to the Rio Grande?! 2. 
6. CAMPOSTOMA, Agass., 1855. 
Campostoma, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 204. 
This genus differs from Hybognathus in having the air-bladder completely surrounded 
by the convolutions of the very long intestine. 
Two species from the United States and Mexico. 
1. Campostoma ornatum. 
Campostoma ornatum, Girard, U.S. & Mex. Bound. Surv., Fish. p. 40, t. 25. figs. 1-4 (1859); 
_ Giinth. Cat. Fish. vii. p. 183 (1868) *; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, 
p- 205°; Meek, Publ. Columbian Mus., Zool. v. 1904, p. 41 *. 
Camposta pricei, Jord. & Everm. 1. c.°. 
Depth of body 4 to 5 in the length, length of head 33 to 4. Diameter of eye 43 to 53 in the length of head, 
length of snout 3 to 3j, interorbital width 4 to 43. 70 to 75 scales in a longitudinal series. Dorsal 
9-10, with 7 or 8 branched rays ; origin equidistant from tip of snout and base of caudal or a little 
nearer the latter; free edge straight or slightly convex ; longest ray considerably longer than the base 
of the fin. Anal 8, with 6 branched rays. Pectoral 2 to 4 the length of head or of the distance from its 
base to the origin of ventrals, which is nearly below that of the dorsal. Caudal emarginate. Caudal 
peduncle nearly twice as long as deep. Sides with dark mottlings; young with a dark lateral band 
ending in a caudal spot; a black band on the basal part of the dorsal fin; ventrals and anal sometimes 
similarly banded. 
Hab. Southern Arizona and Northern Mexico: 
Rucker Cafion, a tributary of the Rio Yaqui in Southern Arizona®; Rio Casas 
Grandes 4 and Rio Conchos !34 in Chihuahua; Rio Nazas in Durango 4. 
Here described from several specimens, 75 to 110 mm. in total length, from 
Chihuahua (Woolman) and San Andres (Meek). 
