."I, 1 1 BUTTONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



301. ITI. pcrcobromus Cop. 



Ilody moderately don-arc. Head rather long, themu/czle aeuminaie. 

 Mouth oblique, the jaws equal, the maxillary extending behind front of 

 orbit. Kye moderaie. :\^ in length, as long as .-noiit. Dorsal beginning. 

 slightly behind ventrals. Seventeen scales in front of dorsal. Color 

 pale, with lateral silvery band ; dorsal scales and scales at base of c 

 dal with dark punctolations. Head :; : J ; depth -1.]. D.8; A. 11 ; scales 

 ;_;;;_:;; teeth L'. 1-1, L'. L. 2 inches. Saint Joseph, Mo. (Cope.) 

 iromua C\n\ Iluyil-n'.s Cool. Snrv. Wyom. 1870, 440.) 



302. .11. rubellus (A-;.) Jor. Rosy Minium'. 



Uudy Inn- 1 and slender, compressed, the back not elevated. Head. 

 blunt, conic, proportionately shorter than in the other species. Mouih 

 moderate, very oblique., upper lip on the level of the upper part of the 

 pupil, maxillary about reaching to the front of the eye. Eye large, 

 rather longer than snout, .'Jj in head. Fins low; the dorsal well behi <! 

 the ventrals, the tips of the ventrals extending to beyond the middl 

 the dorsal. Lateral line decurved. Color translucent green above; 

 sides bright silvery; scales above faintly punctate, but not enough to 

 render them dark-edged, nor to form blotches along the sides; a faint 

 dark vertebral line; males in spring with the snout rosy. Ulead-!-; 

 depth '*},. D.8; A. 11 ; scales r,-.!S-;}; teeth 2, 4-4,1]. L. ~t inches. 

 Great Lake region and Ohio and Mississippi Valleys ; abundant in lakes 

 ind river channels. Variable. The. largest and handsomest species of 

 this genus. 



(ttXiitr,,/,'^ tiil,,-nii, ,'>!<:, Kal'. Aincr. Month. M:t. A- (!rit. Rev. 1818, 204 (vory doubt- 

 ful, perhaps ;i \i>/i mii/miHH): Alburnua rubellua Agaaaiz, L:ikn Superior, IH.'.O, :5 >-! : Al- 

 liurnn^ nitidii* K'iri land, ( 'Icvflaml Ann. Sri. 1-."1, II: AUmrntUus jacitlus and arye 

 ''"\\ ( '>]'i'- I'mn. I.^Uii, :{-<? : fa'Ui'ixciix riilnilux ami fopn ("Jiinthrr, vii, % J."i-1, ^.">r>.) 



303. ,11. (lioK-eims \li\\'. Lnn ruld Minium'. 



Very similar to the preceding, but smaller and more compressed, with 

 -hoiter snout, smaller eye, narrower and more convex interorbital space, 

 which is not wider than eye, and shorter ventrals, which scarcely reach 

 the middle of the dorsal. Colors very pale; lips dusky. Head 

 depth r,.\ (to IA). 1). S; A. 10; BCaleS 6-38-3 J teeth I', 1-1, L'. L. :fi 

 ties. Ohio Valley. Described from specimens taken at the Falls of 

 Ohio. 



'n.i iliin inn. s l.'al'. l.'lilh. oli. t." ; \llni,-:iii!i ililu'liix (Inl. I'lor. Arail. N'.. 

 1'liila. I-.M',. |'i;',: . I //,,//</// Cnl. U.S. 1'ar. R. K. Snrv. x.-J.V.I: .V,>//-./;ix 'HI. 



in. I dun, mi* .lonl.-iii. Man. Vei >7.) 



:JOI. ,11. fiibrirroiis Fordan. J .-d 



Bo<ly moderately elongate, the back scarcely elevated, the caudal 



iuiicle somewhat contracted. Il'-ad longer than in the other species, 



