56. isKYTTUs. 259 



tci'tli on the ])alatiuo bones*. One dorsal, witli ten (occasionally with 

 nine) spines, the anal Hn with three. Operculum with a rounded, 

 ineinl)ranaceous, coloured lobe above the angle : pra)operculum entire. 

 Scales moderate. 



Fresh waters of the Nearctic reoion. 



1 . Bryttus ptmctatus. 



Bryttus punctatus, Cuv. ^- Val. vii. p. 462. 

 uiiicolov, Cuv. H,- Val. vii. p. 464. 



D. ■". A.-i. L. lat. 35. 

 11 8-9 



The height of the body is one-half of the total length (without 

 caudal fin) ; the length of the head one-third. Caudalis cmarginato, 

 Anth rounded lobes ; the first ray of the ventral pointed. Ero^vnish 

 green, -ndth parallel scries of round black spots ; cheeks black- 

 s])otted. Angle and inferior limb of opercuhim blackish. Ventrals 

 black. {Val.) 



Fresh waters of North America. 



2. Brjrttus albulus. 

 Gimrd, U.S. Pucif. B. li. Exp. Fishes, p. 19. pi. 6. f. 1-4. 

 B. 5. D.|^. A.^. L. transv. 6/16, 



The height of the body is 2|, the length of the head 3| in the 

 total length. The upper maxillarj- reaches to the anterior margin 

 of the orbit. Pale reddish brown, dorsal with a black patch (not 

 marked in the figui'c). (Gir.) 



Rio Blanco (Texas). 



3. Bryttus longulus. 



Pomotis longulus, Baird S,- Girard, Proc. Acad. Nat. Sc. Philad, 1853, 

 p. 391, and in Murci/sExplor. Red Rircr, p. 245. pi. 12. 



Bryttus longidus, Baird Sf Girard, I. c. 1854, p. 25. 



Calliurus fonuosus, Girard, U. S. Pacif. R. R. Exped. Fishes, p. 14. 

 pi. 5. f. 1-4. 



longidus, Girard, I. c. p. H>. pi. 5. f. 5-8, pi. 6. f. 5-8. 



D-TT^,- A.^. L, lat. 52. 



The height of the body is about three times in the total length, 

 the length of the head 3| ; the upper maxillary does not extend to 

 the vertical from the posterior margin of the eye. lledtlish brown ; 

 the doi-sal and anal with a subeircular large black spot behind ; 

 veutrals and the external half of the anal yellowish. (B. 4' G.) 



Red River ; fresh waters of Texas and j\a'kansas. 



* Sir J. Ricli.ardson probably made a mistake in franslatin<j tlio diapiiosis of 

 Cuvier, if lio ath-ibutes to tliis genus "a narrow band of villifonn teetli ou the 

 tongue." (khthi/til. p. 277.) 



s2 



