172 CONTRIBUTIONS TO NORTU AMERICAN ICHTHYOLOGY — III. 

 29. CATOSTOMDS OCCIDENTALIS Ayres. 



Western Sucker. 



16£4 — Caio8tomu8 occideiitalis Ayres, Proc. Cal. Ac. Nat. Sc. i, 18. 



Catoslomua occidcntalis Agassiz, Am. .Joiirn. Sc. Arts, 2d series, xix, 209, 1855. 

 (Described us a uew species.) 



Cato8tomu8 occidenlalia Gikakd, Proc. Ac. Nat. Sc. Phila. 174, 1856. 



Cato8lomu8 occidenlal'w Gikakd, U. S. Pac. R. R. Expl. x, 224, 1858. 



Catostomus occidentaUs GOnther, Cat Fishes Brit. Mus. vii, 17, 1868. 



Cato8tomu8 occidenlalis Jdkdan & Copelaxd, Check List, 156, 1876. (Same 

 only.) 

 1856 — / Cat08(omu8 bernardini Gikakd, Proc. Ac. Nat. Sc. Phila. 175. 



f Catosiomus bernardini Gikakd, U. S. Mex. Boimd. Ichth. 40, pi. 23, f. 1-5, 1859. 



? CatoHtomud bernardini GtJNTHER, Cat. Fishes Biit. Mus. v. 7, 17, ItiOS. 



Habitat. — Streams west of the Rocky Mountains, probably generiilly distributed. 



This species was de.scribed almost simultaneously uuder the same 

 uame by Dr. Ayres and Professor Agassiz. Since then it ha^ been little 

 noticed l)y ichthyologists, and its distribution has remained uncertain. 

 The tew specimens in the National Museum indicate, however, a wide 

 distribution. I have here united Cafostomus hcrnardini Girard to C. 

 occidcntaJis. The single specimen made the type of C. bernardini is lost, 

 so that we can probably never know exactly for what the author in 

 tended the name. The size of the dorsal and the form of the mouth as 

 given in Girard's figure indicate a species of Cutostomus rather than 

 Pantoiifcu,s, and as I am unable to distinguish it from C. occidentalism I 

 let it fall into the synonymy. The scales of C. bernardini as figured 

 seem, however, smaller than usual in C. occidentaUs. 



G. occidentaUs is apparently related to C. teres, but is di.stinguished 

 by the form of mouth ami by the somewhat smaller scales. The .si)ecies 

 is "brought to the market in San Francisco, and is said to be quite 

 common in the Sacramento and 8an Joatiuiii liivt'rs." — (GlEAliD.) 



Specimen« in United Slates Xational AluMuni. 



Number. 



1.-..VJ7 

 20814 



Locality. 



Collector. 



(•rt'tMi River, Wyoming . . . 

 McLeod River, Califurnia 



Livingston Stone. 

 LivingHtoD Stone. 



