IN THE ALLEGHENY REGION OF SOUTH-WESTERN VIRGINIA. 227 



This species is abundant in the tributaries of the Holston ; it neither prefers tlie 

 cold and rapid streams, nor tlie river channels, but is found at the mouths of creeks, 

 and in still stretches near the river. 



Ceeatichthts monacus Cope, sp. nov. 



This species resembles those belonging to Phenacobius Cope, in some degree, but 

 has much thinner lips, and a maxillarj^ barbel. No other Ceratichthys at present 

 known resembles it; the marking of its dorsal fin is similar to that in Photogenis 

 spilopterus, Hypsilepis analostanus, and Lepomis megalotis. Tlie 

 barbels are very small ; teeth 4 — 4. 



Eye small, 1'5 in the projecting muzzle; the end of the latter and the upper lip are 

 rugulose or punctate. Isthmus moderately v/ide. Mouth more inferior than in any 

 other Ceratichthys, small, end of maxillary opposite the posterior nares. Operculum 

 much deeper than long; lateral line descending for thirteen scales. Dorsal outline 

 slightly elevated, caudal peduncle contracted. Inferior fins falling far short of each 

 other. Twenty-four scales in front of dorsal. 



Total length 4 inches, lacking -5 of a line. Caudal deeply forked, the inferior lobe 

 a little longer than the superior in three specimens ; length 8 lines ; basis of do. to 

 first dorsal ray 20 lines. From latter to end muzzle 18-8 lines. Depth at orbit 4 lin. ; 

 at dorsal fin 8 lin. ; at last anal ray 4-25 lin. Upper surface to a line from operculum 

 to base of caudal, light olive, with a rufous vertebral band, which has a metallic 

 lustre in life, but is readily obscured in spirits. Below the above line, uniform 

 silvery ; no lateral band, a black spot at basis caudal ; muzzle blackish. Basis of 

 dorsal white, posterior portion black. 



This fish is rather rare, and occurs singly or in pairs in the channel of the Holston 

 River, in Washington County, Va., with the Phenacobius uranops Cope; the habits 

 of the two fishes are probably nearly identical. Its solitary habits and isolated 

 characters have induced me to name it G. monacus. 



RLIINICHTHYS Agass. 

 Rhiniciitiiys nasutus (Ayres) Agass. 

 This species was found in the tributaries of the Kanawha River, Sinking Creek, 

 Walker's Creek, and near Austinville. As elsewhere, it haunts rapids, and its 

 motions are swift and powerful. Color in life dark green, all the fins red; a broad 

 silver band on the caudal peduncle in several specimens. The species has a partially 

 free fatty lobe in the pectoral axilla;, not before noticed. The specimens from the 

 Kanawha have a iew more longitudinal series of scales than those from Pennsylvania, 

 — viz., 15 — 66 — 10; fourteen series on the caudal peduncle. Largest specimen 



4 inches 6 lines. 



58 



