CATOSTOMID^. CIX. 293 



bb. Teeth on the lower half of the pharyngeal bones reduced 

 to about a dozen, which are quite large; upper teeth 

 numerous and small ; bones stout and heavy. 



PLACOPHARYNX, 5. 

 ** Dorsal elongated, of 20 to 35 rays, more or less elevated in 



front ; size usually large ; Buffalo fishes. 



c. Body deep and heavy, usually considerably compressed; 

 general color olivaceous white or brown. (BUBALICB- 



THYIN^E.) 



d. Anterior dorsal rays very much elongated, reaching when 

 depressed at least to the middle of the fin ; back elevated ; 

 mouth small, inferior ; pharyngeal teeth minute, nearly 

 equal ........ CABPIODES, 6. 



dd. Anterior dorsal rays moderately elevated, rarely reaching 

 the middle of the fin ; pharyngeal teeth becoming larger 

 downward ; eye small, operculum very large. 

 e. Mouth sub-terminal, protractile forwards. ICHTHYOBUS, 7 . 

 ee. Mouth inferior, protractile downwards. 



BUBALICHTHYS, 8. 



cc. Body very much elongated, not much compressed ; dorsal of 

 35 rays ; anal with 7 rays, placed very far back, the abdo- 

 men being therefore very long; general color black. 

 . . . . . CYCLEPTUS, 9. 



/. CATOSTOMUS, LeSueur. BROOK SUCKERS 

 > Acomus and Minomus, Grd. 

 = Decactylus, Raf. 



1. C. teres, (Mit.) LeS. COMMON SUCKER. WHITE 

 SUCKER. Depth about equal to length of head, 4 to 4^- 

 in length ; olivaceous, sides silvery, with bright reflec- 

 tions; D. I, 13; A. 8 or 9; lat. 1. 63. U. S., abundant 

 everywhere E. of the Mississippi. (C. communis^ boston- 

 iensiS) etc., of authors.) 



2. C. hudson/uSf LeS. NORTHERN SUCKER. LONG- 

 NOSED SUCKER, Very slender j depth less than length 



