234 ON THE DISTRIBUTION OF FRESH-WATER FISHES 



with a superior dark line ; in C. o r e as, a broad black band extends from the end of 

 the muzzle to the middle of the basis of the anal fin ; another distinct band originates 

 on the middle of the side above the anal, and terminates at the origin of the caudal. 

 If a superior daric line be present, it extends to the basis of the caudal without union 

 with the median band. 



Teeth 5 — 5. Orbit 3-5 in head, equal muzzle in adults, less in young. Head four 

 times in length (basis caudal). Parietal region convex, even in largest specimens, 

 end of muzzle obtuse. Anal rays elongate, in males a little shorter than dorsal, in 

 females notably longer. Scales, longitudinal series 27 — 8, transverse 67 — 9 ; forty 

 rows anterior to dorsal fin. Radii, D. i. 8. C. 19. A. i. 8. V. very short, 8. P. short, 

 12. Total length largest specimen 2 in. 11 lin. End muzzle to origin dorsal 16 lin.; 

 from latter to basis caudal 13"25 lin. 



A silver lateral band extends to the basis of caudal above the black ones ; dorsal 

 region above this olive-green, with black cross-bars, which are most distinct laterally. 

 Below the black bands bright crimson, also on operculum and end of muzzle, but 

 silver on suborbital region. Anterior to pectoi'al fins, including edge of upper jaw, 

 deep black. All the fins deep yellow, the anal red at the base, dorsal same, with 

 black edging above. 



Habitat — The mountain streams forming the head of the Roanoke, in Montgomery 

 Co., Va. The females, which are larger than males, and less brilliant, deposit their 

 e!i"'s towards the end of the seventh month. 



HYBORHYNCHUS Agass. 



Hyborhynchus superciliosus Cope, spec. nov. 



Char. — The head at the orbits wider above than below; least interorbital Avidth 

 1'5 length of head and muzzle above, preorbital width greater. A short barbel at the 

 oral canthus. Vertex, front and mouth black ; sides slate. 



Descr. — Form elongate, with deep caudal peduncle and short caudal fin. Muzzle 

 excessively obtuse, with three transverse sei'ies of tubercles, the inferior of seven, 

 median of five, and superior of two. Mouth very small, inferior, with a distinct 

 dermal appendage at the angle. Supranareal crests strongly developed; vertex 

 rugose through the projection of the ossified tubes of the mucous system ; inter- 

 opercular bone similarly furnished. Orbit half interorbital width, four times in 

 length of head. Four specimens are of rather more elongate form than the others ; 

 in them the length of the head enters the length 4"5 times, in the others 4 times; in 

 the first the depth of the body enters the length 5-25 times, in the others 5 times. 

 Scales 6 — 41-3 — 4(3). Fins all small, the dorsal longer than high; in large 



