275 



to Tenn. and S.; a fish of remarkable appearance, singu- 

 larly distinguished from all our other CyprinidcB by the 

 three-lobed lower jaw. 



2. E. mirabile, Grd. WESTERN STONE TOTER. Head 

 5 in length; dorsal nearer snout; D. I, 9 ; A. I, 8. 

 Arkansas R. 



2. CAMPOSTOMA, Agassiz. STONE LUGGERS. 

 1. C. anomalum, (Raf.) Ag. STONE LUGGER. STONE 

 ROLLER. Brownish, with a brassy lustre above, the 

 scales more or less mottled with dark; a black vertical 

 bar behind opercle; iris usually orange-red; dorsal and 

 anal each with dusky cross-bar about half way up, the 

 rest of the fin olivaceous, or in spring males fiery orange ; 

 males in spring with many rounded tubercles on head, and 

 usually the whole upper surface in no other genus are 

 these nuptial appendages so extensively developed 

 scales deep, rather small and crowded anteriorly; intes- 

 tinal canal six to nine times the total length of the body, 

 its numerous convolutions passing above and around the 

 air-bladder, an arrangement found in Campostoma alone 

 among all the Vertebrates; D. I, 8; A. I, 7; lat. 1. 50 to 

 55; L. 4 to 8; herbivorous. Mississippi Valley, every- 

 where abundant; one of the most curious and interesting 

 of American fishes. [C. dubium, (Kirt.) Cope. C. cal- 

 lipteryx, gobioninum, etc., Cope.] 



3. PIMEPHALES, Rafinesque. ROUND -HEADED 



MINNOWS. 



1. P. prome/as, Raf. FAT -HEAD. BLACK HEAD. 

 Head almost globular, black in adult males; snout in $ 

 with several large tubercles; body very short and deep; 

 scales crowded; eye small; mouth very small and short; 

 a large black dorsal blotch; males dusky; females oliva- 



