[19] CATALOGUE OF THE FISHES OF NORTH AMERICA, 



63.— ERIMYZON Jordan. (66) 



176. Erimyzon sucetta' LacepM«. Vs. (150) 

 176b. EHnuizon sucetia ohlo7igu8 MitchiU. Vu. (149) 



64.— MINYTREMA Jordan. (67) 



177. Minytrema melanops Ratinesque. Vvr. (151) 



65.— MOXOSTOMA Rafinesque. (68) 



178. Mozostoma papillosum Cope. Vse. (152) 



179. Moxostoma velatum Cope. Vw. (153) 



180. Mozostoma pidiense Cope. Vee. (155) 



181. Moxostoma coregonus Cope. Vse. (156) 



182. Mozostoma album Cope. Vse. (157) 



183. Moxostoma thalassinum Cope. Vse. (158) 



184. Moxostoma valenciennesi- Jordan. Vn. (159) 



185. Moxostoma macrolepidotum Le Sueur. Ve. (160) 

 185 b. Moxostoma macrolepidotum duquesnci Le Sueur. Vw. 



186. Moxostoma aureolum => Le Sueur. Vn. (161) 



187. Moxostoma crasailabre Cope. Vse. (162) 



188. Moxostoma congestum * Cope. Vsw. (166) 



terorbital space 4^ ; air-bladder with two cells; D. 12; A. 1, 8; scales, 13-65-11. 

 Pyramid Lake, Nevada; in deep water. (Cope.) (Chaamistes cujua Cope, Proc. Ac. 

 Nat. Sci., Phila., 1883, 149.) 



This paper " On the Fishes of the Recent and Pliocene Lakes of the Western Part 

 of the Great Basin aud of the Idaho Pliocene Lake " contains an important discussion 

 of the fish fauna of Nevada, Oregon, and Idaho, with description of numerous fossil 

 forms not long extinct and closely allied to recent Cyprinidce and Catostomidce. 



' The two forms of Erimyzon described in the Synopsis as E. sucetta and E. goodei seem 

 to be geographical varieties of one species, southern specimens having the scales con- 

 siderably larger and more regularly arranged than in northern ones. To the south- 

 ern form belong the typical examples of Moxostoma kennerlyi Girard and Erimyzon 

 goodei Jordan. Specimens of this form have been examined by me, from streams of 

 South Carolina, Georgia, Florida, Alabama, Louisiana, Illinois, and Texas. From 

 Alabama, Louisiana, and Illinois I have seen specimens more or less distinctly inter- 

 mediate, while from Virginia to Indian Territory (types M. claviformis) and north- 

 ward only the small-scaled form occurs. It is probable that the original description 

 of Cat. sucetta Lac. belongs to the southern form {kennerlyi = goodei). The northern 

 form may then retain Mitchill's name, oblongus. 



-Moxostoma valenciennesi Jordan, Proc. U. S. Nat. Mus., 1885=:= Catostomus carpio 

 C &V., not of Raf. 



3 1 now omit from the list, Moxostoma hucco Cope, based on the young of some species, 

 probably of M. aureolum. 



* I have recently found the types of Catostomus congestus and Ptychostomus albidua. 

 They belong to the same species, a species shown by the late explorations of Jor- 

 dan & Gilbert in Texas, to be very abundant in the waters of that State. The type 

 of P. albidus has 44 scales in the lateral line instead of 56 as shown in Girard's figure. 

 The specimens from Ash Creek, Arizona, referred with doubt to this species by Cope 

 & Yarrow (Lieutenant Wheeler's Expl. Zoology, V. 680, 1876) belong apparently to M. 

 congeatum. The following account is taken from specimens taken by us in Lampasas 

 River, at Belton, Tex. : 



General form of M. aureolum, rather robust, moderately compressed, the back some- 

 what elevated . Head comparatively short, rather broad above and pointed anteriorly ; 



