G6G BULLETIN UNITED STATES GEOLOGICAL SUEVEY. 



of them is perhaps as unsatisfactory a piece of work as has yet been 

 done in American ichthyology. Any one who donbts this may read the 

 descriptions of Montana couoki, Moniana rutila, and Moniana gracilis as 

 given by Girard, and then, as suggested by Dr. Giinther, compare with 

 each other the two figures given of Moniana frigida. The descriptions 

 are throughout worthless for purposes of identification, and the figures 

 are executed by an artist who made in the same way all the fishes drawn 

 " at one sitting". Moniana alhurnellus, Cliola, Meda, Algoma, Bionda, 

 or what not, the figures show the same physiognomy. 



Genus PHENACOBIUS Cope. 



(FhenacoMus Cope ; Saroidium Cope.) 



Phenacobius scopiferus (Cope) Jordan. 



1872 — Sarcidium scopifertim Cope, Hayden Geol. Surv. Wyoming, 1870, p. 440. 



Sarcidium scopiferum Jordan & Copeland, Check List Fishes N. A. j). 146, 1876. 



Phenacobius scopiferus, Jordan, Man. Vert. ed. 2d, p. 299, 1878. 

 1876 — Phenacobius tereiuhis var. Uosternus Nelson, Bull. Ills. Mus. Nat. Hist, i, p. 46, 

 1876. 



Phenacobius Uosternus Jordan & Copeland, Check List, p. 149, 1876. 



A single good specimen, apparently belonging to Professor Cope's 

 species. The head is, however, shorter and thicker than in the types of 

 scopiferus, and the body is stouter. The head is contained 4| times in 

 the length, being thus about equal to the depth of the body. I am not, 

 however, disposed to consider it a " new species", inasmuch as in other 

 respects it agrees with scopiferus. P. mirahilis {Exoglossum mirahilis 

 Grd.) has apparently a more slender body and smaller scales. These 

 species have much narrower lips than the typical Phenacohii, teretulus, 

 tiranops, etc., but Sarcidium can hardly be considered as a distinct genus. 



Genus CAEPIODES Ptafinesque. 



Carpiodes oyprinus (Le Sueur) Agassiz. 



Since the remarks on this species, on page 405, were in press, I have 

 examined a fine example of Carpiodes grayi Cope, collected in the Eio 

 Grande by Dr. Loew. It is evidently identical with my specimens from 

 Brownsville, and agrees in every respect with the figure of Ictiobus 

 tumidus in the Mexican Boundary Survey. Moreover, it is not distin- 

 guishable from typical examples of Carpiodes damaiis from the Platte 

 Eiver, which in turn cannot be at present separated from the Eastern 

 Carpiodes cyprinus. Wherefore I propose to unite all these nominal 

 species under the oldest name, as Carpiodes cyprinus (Le Sueur) Agas- 

 siz, until some positive difference is shown. The species as thus defined 

 would range from the Delaware Eiver to the Alabama east of the Alle- 

 ghanies, thence to the Eio Grande and the headwaters of the Kansas 

 and the Platte. It is not yet known from the Great Lake Eegion nor 

 from the Ohio. 



