IX THE ALLEGHENY REGION OF SOUTH-WESTERN VIRGINIA. 233 



the main channels, seldom the small streams, as observed also in Michigan. Our 

 specimens exhibit seven scales above the lateral line as frequently as six. Largest 

 specimen 3 in. 1'5 lines. 



In life pale olive above, with a dorso-lateral concealed golden line ; sides and below 

 silvery, often rose-colored. 



Albuenellus micropteryx Cope, sp. nov. 



This species approaches the A. jaculus, and differs in the smaller size and more 

 backward position of the dorsal, the smaller ventrals and other fins, the shorter head, 

 and the larger scales. The latter are (5)6 — 39 — 2; the head 4-5 times to basis 

 caudal instead of 4 times. The ventrals cease below the fifth dorsal ray, instead of 

 the last. Height of dorsal six times from origin dorsal to front of orbit ; five times in 

 A. jaculus. It originates opposite the posterior third of the ventral; \n A. jaculus 

 opposite the anterior fourth or third. 



Orbit equal length of muzzle ; lateral line considerably decurved ; greatest depth 

 in length (exclus. caudal) 5'5 to 5'75 times. Total length 2 in. S lin. 



Habitat. — The Holston River. Two specimens of this species were compared with 

 one hundred of the preceding. 



CHROSOMUS Rafin. Agass. 

 Chrosomus oreas Cope, sp. nov. 



This species is probably the most varied and brilliant in coloration of the known 

 species of our fresh-water fishes. It is nearly allied to the Chr. eos Cope, from 

 which it may be known by the few following structural features : 



C. eos: The preorbital bone is deeper than long, and reaches the extremity of the 

 maxillary, Avhich latter does not reach the line of the orbit ; the supero-posterior 

 margin of the operculum is strongly concave : the parietal branch of the mucous 

 tubes is not developed. 



C. oreas : The prsBorbital bone is longer than deep, falling considerably short of 

 the extremity of the longer maxillary, which attains the line of the orbit ; supero- 

 posterior margin of the operculum straight or convex; parietal mucous tube well 

 developed. 



x\s features less likely to prove constant, the C. oreas are all deeper and stouter, 

 the depth entering the length 4-5 times; in the C. eos 5 times. The lateral line is 

 distinct often to opposite the dorsal fin in C. or e as, in C. e os a trace visible on one 

 side in one of four specimens. I have elsewhere stated the line to be absent, but the 

 character is not constant in that species or in C. e r y t h r o g aster. 



The pattern of coloration in the two fishes is different. In C. eos a black band 

 extends from the end of the muzzle to the origin of caudal fin, uniting on the peduncle 



