44 TKLKOSTEI : EVKNTOUNATllI. — XII. 



hh. Mouth siniriilar, the upper lip not protractile, prenfly enlarged; 

 thf liiwiT split into two scitarate lobes; pliaryiif^cal ^)llMt'^, <!tc. 

 as ill .J/«..n>.«((.;;i'i Lauochila, 48. 



41. ICTIOBUS llafincsque. BuFFALO-FisnES. 



(This genus contains an uncertain number of species, very few 

 of which have been yet well delined. They are larcje, coarse 

 suekcrs, especially characteristic of the streams of the Mississi[)pi 

 vallev. The proup nuich needs careful study, such as could only 

 be jjiven by a collector resident near some larj^e market), (i^^ur, 

 fish ; /SoOf, buffalo.) 



a. Mouth larf^c, tcnniiial, protractile forwards; lips thin; lower pharyngeals 

 anil teeth weak. (Hcleroynathus Cuv. & Val.) 



06. I. cyprinella (Cuv. & Val.). Common Bcffalo-kish. 

 Rf-D-moutiiki) IUi iai.o. Body robust, the outline somewhat 

 elliptical; head very large and thick; o|>ercle coarsely striate, 

 nearly lialf length of head ; lips scarcely plicate ; color dull brown- 

 ish olive, not silvery; fins dusky. Hea<l .S^; deptli 3. D. '2H, A. !•; 

 .scales 7-37 to 41-6. L. .3 feet. Miss, valley, etc., common; reaches 

 20 to 40 pounds weight. (Lat., a small carp.) 



aa. Mouth smaller, more or less inferior, protractile downward.s, and with 

 thicker lips. 

 b. Lower ])iiarynf;eal bones strong, the teeth comparatively coarse and 

 lariTc, increasing in size downwards ; dusky species, not silvery. 



(htitibus.) 



67. I. urus (Agassiz). Razor-backed Buffalo. ^Iongrel 

 Buffalo. Body not much elevated, the back not keeled, the 

 axis of the body not much farther from back than from line of 

 belly ; head thicker and blunter than in /. huhtilus : eye smaller 

 than in I.bubdlux: mouth much larjjerand more oblique, approach- 

 ing that of /. rjijiriui'Ud, but with lips thicker ami plicate, the, folds 

 J)niken up into papilla! ; longest dorsal rays scarcely half of base of 

 fin, operclc coarsely striate. Color very dark; fins dark. Head 

 3^ to 4; depth 3. I). 30; scales 8-41-7. L. 2^ feet. Miss, valley, 

 less common tlian the otliers ; certainly different from /. hulmlus, 

 but not always distinguishable by me from /. ci/princlln, and f)ossi- 

 l)ly not really different. (Lat., a wild bull.) 



68. I. bubalus (Rafincsque). SucKEU-MOUTHKn BfKKAi.o. 

 Small-moi- riiKi) HiKKALO. Body consideral)ly elevateil ihe 

 ba<'k compressed; axis of body much nearer line of belly tiian 

 back ; head not very blunt, tlie mouth small and inferior ; eye 4 to 

 5 in head, rather lar^c ; longest dors.il rays much more than half 

 l)ase of fin in adult ; coloration dusky, the fins scarcely black. 

 IIea«l 4 ; depth 2^ ; D. 29; scales 8-39-6. L. 2J feet. Miss, valley, 

 etc., common. {Hubalichthys bubalus Ayassiz.) (Lat., builalo.) 



