312 FISHES. 



3. MYXOSTOMA, Rafinesque. Red Horse. 



(Moxostoma et Teretulus^ Rat".) 



{Ptychostomiis^ Agassiz.) 



* Lower lip not infolded and "/y shaped;" lips distinctly pli- 

 cate. 



f Lower lip full, its posterior edge truncate or slightly rounded. 



a. Species with the body distinctly compressed, the depth 3i 

 to nearly 5 in length. 



b. Dorsal fin largely developed, the rays 15 to 18 in number. 



1. M. carpio, (Cuv. & Val.) Jordan. White Mullet 

 OF the Lakes. Head rather large, 3f to 4^ in length, 

 broad above; mouth large, with full lips; eye rather 

 largo; body deep, strongly compressed; the back some- 

 what elevated, the depth about 3:^ in length; dorsal fin 

 high and large, larger than in any of the others; scales 

 5 — 43 — 4,* quite large; coloration very pale and silvery, 

 the lower fins white. Grer.t Lakes, and occasionally in 

 the Ohio River; a handsome and well defined species. 



hh. Dorsal fin moderate, its rn • ; 1" to 1 i in number. 

 c. Caudal fin normal, the two lobes ab )ut equal and similarly 

 colored. 

 d. Scales large, 41 to 50 in the course of the lateral line, 



e. Head singular in form, much shortened, the muzzle very 

 abruptly decurved, descending almost perpendicularl}' 

 in front of the eye; the head wedge-shaped from be- 

 hind forwards, and less so from below upwards, its 

 sides subvcriical and the lower cross-diameter of the 

 head greater than the upper. 



2. M. euryops, Jordan. Snub - Nosed Sucker. Eye 

 very large, more than one-third the length of the side 

 of the head (in an individual of six inches in length); 



* That is. 43 scales in the lateral line, 5 rows between the lateral line and the 

 dorsal fin, and 4 between it and the ventrals. 



