,426 BULLJiTlN UNITED BTATEK GEOLOGICAL SUKVEY. 



57.— Rhinichthys Agassiz. 1850. Black-nosed Dace. 



329. BMnichthys atronasus (Mitch.) Ag. New England to Ohio and 



Virginia. 



330. Rlmiichthys ohtuaus Ag. Michigan to Alabama, {d. s.) 



331. Rhinichthys dulois (Grd.) Jor. Nebraska to Utah. {d. s.) 



332. BMnichthys meleagris Ag. Illinois ; Iowa. 



333. Rhinichthys maxillosus Cope. Slopes of Eocky Mountains. 



334. BMnichthys cataractce (Val.) Jor. New England to Virginia and 



Wisconsin. (B. nasutus (Ayres) Ag.) 



58, — Apocope Cope. 1872. , 

 § Apocope. 



335. Apocope carringloni Cope. [Jl<ah. 



§ Eritrema Cope. 1876, 



336. Apocope herishaici Cope. Utalj ; Idaho, {d. s.) 



337. Apocope vulnerata Cope. Utah. 



338. Apocope oscula (Grd.) Cope. Colorado; Utah; Arizona; New 



Mexico. 

 331). Apocope coiiesi Yarrow. Mountain streams, Arizona, {d. s.) 

 340. Apocope ventricosa Go^e. Arizona: New Mexico, {d. s.) 

 34,1. Apocope notabilis [Grd.) Joy. Souora. {d. s.) 



342. Apocope nuhilus {Gn\.) Joy. Washington Territory. 



59 — Ceratichthys Baird. 1853. Horny Heads. 



(f Hyhopsis, Agassiz. Nocomis et Hyhopsis, Grd.) 

 § Ceratichthys. 



343. Ceratichthys biguttatus (Kirr.) Girard. Pennsylvania to Utah and 



south. 



344. Ceratichthys micropogon Cope. Eastern Pennsylvania, {d. s.) 



■ 345. Ceratichthys nehrascensis (Grd.) Jor. Sweetwater River, [d. s.) 



§ fllyhopsis Ag. 1854. 



346. Ceratichthys amhlops (Raf.) Grd. Ohio Valley. 



347. Ceratichthys gracilis {Ag.) Jor. Tennessee to Georgia. {C.ivinchelU 



(Grd.) Jor. C. hyalinns Cope.) [d. s.) 



348. Ceratichthys ruhrifrons Jordan. South Carolina ; Georgia. 

 o49. Ceratichthys hypsinotus Cope. North Carolina. 



350. Ceratichthys dissimilis (Kirt.) Cope. Ohio Valley. 



351. Ceratichthys sterletm Cope. New Mexico. 



