NTRIBUTIONS 1<> V>l;TH AMI, KHAN ICHTHYOLOGY - IV. 



orbital width being nearly halt' the- length of the head. Mouth ratlin 

 large, .slightly oblique, the upper lip on the level of the lower part <>!' the 

 . the maxillary reaching the line ol' the front of the eye, the upper jaw 

 V&cy protractile, the lower jaw ineluded. Eye small, rather high up 

 and anteiie.r. <i in head. Fins rather large; dorsal in advance of the 

 m.ddle of the body; caudal peduncle rather stout. Scales large and 

 silvery: lateral line decurveo Scales in front of dorsal. Coloratioi. 



pale; back bluish: sides and below silvery: head mostly white ; iius 

 pale. Head I', ; depth i , : . 1). 8| A.S : scales <i-;iO-.- : teeth L>, -1-1 

 L. 1L' inches. Kocky Mountain re-ion from the Kansas and Yellow- 

 Stone liivers to the Saskatchawan ; abundant. 



(L Kirli. !';t:ilia I'.ol .-AllltT. l'i '. t'JU: 



. Ar;ul. Xui. Sri. I'hila. 1-.">U, 183, and U. S. 1'ar. K'. K. Surv. x, 



-'IT: .'nit Gill, Irhtli. l'a;i:;:iii Simpson's .Surv. -li.i-': /'.>.,. ./,'r/</7< i/x (I'hi- 



tytjubix') uiiloii'li. \<- a <l. Nat. Sci. Phila. 1864, 277 : Leu > '.Hi- < ;iiu- 



lhcr. \'ii. '.'I' iixliiit, tin* (iiintlicr, vi ; 



316. P. pallidus F>rin -s. >p. n.,v. 



flie depth is contained 4ij times in length, and the head -1. Thee\< 

 equals the snout, and enters length of head .'J;^- times and the interor 

 :e twice. The head is ilat above and the snout overhangs the 

 Tiionth. whirh is large and wide, with a maxillary barbel about one-third 

 a- long as the e\r. The mandible reaches a vertical line drawn thru: 



middle of the iris in front. The greatest depth of the head enters 

 n- i'-ir The scales are <>-.V-,~i. with -L' rows before dorsal, 



where they are nineh smaller than elsewhere. The lateral line is straight, 

 ' pt for a few scales in front. flic pectoral fins are large and pointed, 

 leaching the ventrals. and the latter attain the vent. The front of the. 

 dorsal i- >itnated a tri lie before the ventrals and a lit tie nearer snout 

 than caudal. I. >: A. s. The color in alcohol is plain, with a 

 plumbeous lustre along sides, and traces of a dusky lateral stripe behind 

 dorsal. The pharyngeai tee; li are stout, :'. 1- I, L', hooked, wit h masi i 

 calory .surface. I.. i'A inches. < Mie specimen I'lom the Ohio Ifivcr at 



10. pmbably adult, as the snout is tnberculai (/'Vi/Vyr.v, MSS.) 



Chubs. 



"I/mi,- \ li-.-Un : < 'Ini. I'.-iird.) 



r. 1 182 kmolihu R&f, = Cyprinw oorporalia 



Mit( 



robust. Head lai Moulh lerininal, tlie n]>per jaw j>ro- 



^mall barbel on the maxillary just above \\< extremity. In. 



