184 C0NTKII5U1I0-N.S TO NCIITII AMKKICAN ICUXnYOLOOV III. 



lor lluit of jarrorii. Il' 1 liad not bci'ii able to compare gcncrosus with 

 jarrovii, I should never have suspected their identity. 



Sjpecimens in Uniiid States Xatioiial Mtmeum. 



41. PANTOSTEUS PLEBEIUS {Baird & Girard) Jordan. 



Flain Sitclcr. 



1854 — Catostomus plehdua B.unD & GutAun, Proc. Ac. Nat. Sc. Pbila. 28. 



Catostomus jylebius Agassiz, Am. Journ. Sc. Arts, 2d series, xix, 208, 1855. 



ilinomiia jihbciiis Gikahd, Proc. Ac. Nat. Sc. Pbila. 1715, 185(5. 



Minomns 2)lcbeiit8 Girard, U. S. Mex. Bound. Surv. Icbtb. 38, pi. xxii, f. 1-4, 1859. 



Catoxtomits jihhfjns GtJ'NTiiEit, Cat. Fisbes Brit. Mus. vii, 15, 1808. 



Caiontumus 2>hl)(ju8 JoKDAS & Copki.and, Cbeck List, 150, 1876. 



Pantostcus plebeim J OliD AN, Bull. U. S. Nat. Mus. xi, p. — , 1878. 

 1>72— J/inoniHS (M2)hinus CoPK, Hayden's Geol. Surv. Wyomin«?, 1870, 435, 1R72. 



Panlostem ddphinus Cope & Yauuow, Lieut. Wbeeler's Rept. Expl. W. lOOtb 

 Mer. vol. 5, 673, 1876. 



TantoHtem dotphinns Jordan &. Copeland, Cbeck List, 156, 1870. (Misprint for 

 delphiuus.) 

 1872 — Minomus hardua Cope, Hayden's Geol. Surv. Wyoming, 1870, 430. 



Pantostens bardns Cope, Lieut. Wheeler's Expl. W. lOOtb Mer. vol. 5, p. 073, 1870. 



PantoHtiuH hardus Joijdax & Copeland, Cbeck List, 156, 1876. 



IIaiuta'". — Basin of Ibo Colorado. Lake Guzman. 



Tiie types of CatoHtomiiH plchehtu are not to be I'ound, and no .speci- 

 mens rcli-ralile to the species are in tlie National ."Mnsenni. The types 

 of rantostcua dvlphinus and 1\ bardits 1 have been unable to examine. 

 The scaleforniuhi and small dorsal fin of C. lAcbdus indicate that it is 

 a species of Fantontciis. Assnniiuj; that it is so, 1 lind n)yself unable to 

 vlraw lioni the printi'd «1( scriptionsof j>/t7>e}MS, rff//>/u;jws, and iKinhts nuy 

 sort of Ki)ecilic characters. Until such characters are shown, the burden 

 of proof lies with the proposer of those species, and I shall consider them 

 as identical until they are proved to be distinct. In characters of mouth, 



