11G CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



flu- somewhat stronger teeth. The two genera, with perhaps Carphflc* 

 aNo. should probably In- reunited. Three species are known, two in the 

 I'nited Stairs and a third in Central America.* (/?u/3aJoj, buffalo; 



;, fish.) 



1 1 f . B. urn* .\x.i;i,/-mrnit]il lliiffnlo. 



I'.udy much less elevated and less compressed than in B. altus, 

 the back not at all carinated ; axis of body above ventrals about at the 

 lateral line, and but very little farther from the dorsal outline than from 

 the \vntral: depth ; > - i ;j in length. Head very stout, strongly trans- 

 versely convex, thicker, larger, and less pointed than in the other, 

 about 4 in length. Eye about equal to snout, 5i in head, much smaller 

 than in 11. dltnx. Mouth large, considerably oblique, opening well for- 

 wards. Mandible longer than eye. Premaxillary somewhat below sub- 

 oil >ital. Dorsal fin lower and less rapidly depressed than in the next, 

 the longest ray scarcely half the length of the base of the fin. Anal fin 

 rounded; its rays not rapidly shortened ; the middle ones not much 

 shorter than the longest. Colors very dark; fins all black. Scales 

 >-ll-7; I). 30; A. 10. Mississippi Valley ; in the larger streams. 



' .irjiintlrx nritn Agassi/, Ainer. Journ. Sri. Arts. 1-7.1, 355: BnbaH<-ltt]iti* );<<, niyer, 

 Atjassiz, Ainer. Journ. Sci. Arts, 1855,193-195; Jordan, 1. c. 209.) 



115. B. Stilus Nelson. Small-monthcd Buffalo. 



JJody considerably elevated and compressed above; the dorsal region 

 siibcarinate: belly thicker : depth '2\ -2'[ in length; axis of body above 

 i li<- ventrals, belo\v the lateral line, and nearly twice as far from the back 

 as from the belly. Head moderate, triangular in outline when viewed 

 from the side, 4 in length. Eye equal to snout, 4-5 in length of head, 

 much larger than in /.'. itrun. Mouth quite small, notably smaller and 

 more inferior than in Ji. iirux. Mandible about equal to eye. ])orsal 

 I'm elevated in front and rapidly declined, the highest ray reaching 

 much beyond the middle of the fin, the seventh ray about half the 

 length of the third or longest. Anal lays rapidly shortened behind, the 

 middle rays much shorter than the lirst long ones. Scales 8-39-G ; 



/.'. i/i 1 1-iiHiiinili* ((.iintlnn .Ionian. Month small, inferior, slightly corrugated. 

 1 >e|iih ".'. :'. 1 in length. Head 1-1'. not nineli longer tlian lii^li. - .ye rather small, 

 -111 ih of I lie li-nut !i "f thr lie.-ul .-md t \vo-li fi I s th;il of i lie snout. Snlx.rl.i I ;i]s nar- 

 Anli i MM dor-.il royfl not inueli nroiliie.-d. sliorler I lian the In ail. Caudal forked. 

 ,,f \cnlral MTUeally lelo\v the fourth dorsal ray. I'eetnral I'm not extending 

 li. \ i-ntrals. Therr an- ' longitudinal series of scales l.i-t\veen the lateral line and 

 tlie loc.t 1,1 the \i-mial. Coinration uniform. S. -ili-s 7-'.\*-~ ; D. 5i9 ; A. 10. Rio Us u- 

 iii:i< inia, (Jiiati-mala. ^< 1 iintlttr.'} *- ' / jmithu* imridivmilia (JiintluT, vii, 5i3.) 



