ABRAMIS. — CAMPOSTOiMA. 149 



5. ABRAMIS, Cuv., 1817. 

 Abramis, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 189G, p. 219. 



Body ovate, compressed; abdomen behind the ventral fins compressed to form a keel. !Moutli small, 

 protractile ; no barbels. Phar3'ngeal teeth compressed, hooked, in a single series, .5 — .3. Scales rather 

 large ; lateral lino complete, decurved. Dorsal fin short, posterior to the ventrals ; anal more or less 

 elongate. 



Eight species in Europe and Western Asia and one in North America. 



1. Abramis chrysoleucus, Mitchell, 1814. 



Abramis chrysoleucus, Jord. & Everm. Bull. U.S. Nat. ilus. xlvii. 189G, p. 2.jO ' ; Meek, Publ. 



Columbian Mus., Zool. v. 1904, p. 57 ^ 

 Ilab. Dakota and Nova Scotia to the Rio Grande ^ ". 



6. CAMPOSTOMA, Agass., 1855. 

 Campostoma, Jord. & Everm. Bull. U.S. Nat. j\Ius. xlvii. 1896, p. 204.. 



This genus differs ixon\ 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. Sarv., 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 3| to 4. Diameter of eye 4| to 5^ in the length of head, 

 length of snout 3 to 3j, interorbital width 4 to 4^. 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 4 to | 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. 



Ilab. Southern Arizona and Northern Mexico : 



Rucker Canon, a tributary of the Rio Yaqui in Southern Arizona ^ ; Rio Oasas 

 Grandes * and R-io Conchos i ^ 4 i^ Chihuahua ; Rio Nazas in Durango 4. 



Here described from several specimens, 75 to 110 mm. in total length, from 

 Chihuahua ( Woohnan) and San Andres {Meek). 



