402 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



1856 — Dionda argentosa Girard, Proc. Ac. Nat. Sc. Pbila. 178. 



JDionda argentosa Girard (1859), U. S. Mex. Bound. Survey, Ichth. 4.3, pi. 2b, f. 5-8. 



Dionda argentosa Jordan & Copeland (1876), Check List, 147. 

 1856 — Dionda cJirysitis Girard, Proc. Ac. Nat. Sc. Phil. 178. 



Dionda chrysiiis Girard (1859), U. S. Mex. Bound. Surv. Ichthy. 43, pi. 26, f. 13-16. 



Dionda chrj/sitis Jordan & Copeland (1876), Check List, 147. 

 1856 — Dionda papalis Girard, Proc. Ac. Nat. Sc. Phil. 178. 



Dionda papalis Girard (1859), U. S. Pac. R. R. Surv. x, 228. 



Dionda papalis Jordan & Copeland (1876), Check List, 147. 



Numerous specimens of a slender, s-ilvery species of Hybognatlius, 

 agreeing equally well in all essential particulars with all of Girard's 

 descriptions and figures above cited. I therefore unite them all under 

 the oldest name, without much hesitation, as even if other species of the 

 group called Dionda occur, we cannot safely refer them to any one of 

 Dr. Girard's species more than to another, except in those few cases where 

 the typical examples have been preserved. S. e^isco^ms, spadiceus,plum- 

 beus, and melanops are apparently species distinct from serenus. Some 

 of the species called HyhorhyncJius may prove to belong to Hyhognathus. 



8. — HYB0G2yATHUS MELANOPS (Girard) Jordan. 



1856 — Dionda melanops Girard, Proc. Ac. Nat. Sc. Phila. 178. 



Dionda melanops Girard (1859), U. S. and Mex. Bound. Surv. Ichthy. 44, pi. 26, f, 

 17-20. 



Dionda melanops Jordan & Copeland (1876), Check List, 147. 

 J856 — Dionda couchi Girard, Proc. Ac. Nat. Sc. Phila. 178. 



Dionda couchi Girard (1859), U. S. and Mex. Bound. Surv. Ich. 44, pi. 26, f. 1-4. 



Dionda couchii Jordan & Copeland (1876), Check List, 147. 



Numerous specimens of a short, compressed, and deep-bodied species, 

 apparently identical with Girard's melanojis and couchi. 



Genus PIMEPHALES Eatinesque. 



'9. — PiMEPHALES PROMELAS Rafiuesque. 



1820 — PimepTiales promelas Raf. Ich. Oh. 94. 



Pimephales promelas Kirtland (1838), Rep. Zool. Oh. 194. 



Pimepliales promelas Kirtland (1838), Bost. Journ. Nat. Hist, iii, 475. 



Pimephales promelas Stoker (1846), Syn. 418. 



Pimephales promelas Agassiz (1855), Amer. Journ. Sci. Arts, 220. 



Pimephales promelas Putnam (1863), Bull. M. C. Z. 8. 



Pimephales promelas Gunther (1868), Cat. Fishes, vii, 181. 



Pimephales promelas Jordan (1874), Ind. Geol. Surv. 224. 



Pimephales promelas Jordan (1876), Bull. Bufif. Soc. Nat. Hist. 94. 



Pimephales promelas Jordan (1876), Man. Vert. 275. 



Pimephales promelas Jordan & Copeland (1876), Check List, 146. 



Pimephales promelas Nelson (1876), Bull. Ills. Soc. Nat. Hist. 45. 



Pimephales promelas Jordan (1877), Bull. U. S. Nat. Mas. ix, 32. 

 1856 — Pimephales maculosus Girard, Proc. Phil. Ac. Sc. 180. 

 1858 — Pimephales maculosus Girard, Pac. R. R. Surv. x, 234. 

 1858 — Pimephales fasciatus Girard, Pac. R. R. Surv. x, 234. 



