50. LEuciscis. 249 



author speaks of several specimens serving for the description in 

 one place, enumerating one only in another. 



33. Fifty or less scales in the lateral line. 



1. Pharyngeal teeth in two series, 



a. Origin of the dorsal fin opposite to the root of the ventrals. 



58. Leuciscus comutus. 



Red-fin, Red Dace, Rough-liead. 



Cj'prinus comutus, Mitchill, Am. Month. Mag. i. p. 324. 



Leuciscus comutus, Storer, Bost. Journ. Nat. Hist. iv. p. 182 ; Dekay, 



New York Faun. Fish. p. 207, pi. 29. fig. 92. 

 HypSolepis comutus, Stoi-er, Mem. Amer. Acad. v. 1855, p. 284, pi. 21. 



fig. 3 ; Cope, Proc. Ac. Nat. Sc. Philad. 1864, p. 279. 



frontalis, Ayassiz, Lake Super, p. 308, pi. 3. fig. 4. 



gracilis, Agassiz, I. c. p. 370. 



Plargyrus comutus, Girard, Proc, Ac. Nat. Sc. Philad. 1856, p. 196. 

 ? Plargyrus bowmaiii, Girard, I. c, and U-. S. ^- Pac. It. P. F.vped. Fish, 



p. 263, pi. 59. figs. 1-5. 

 Hypsilepis cornutus. Cope, Trans. Am. Phil. Soc. xiii. p. 372. 



D. 9-10. A. 10-11. V. 8-9. L. lat. 43. L. transv. 8|/6. 



The height of the body is nearly equal to the length of the head, 

 and about one-fourth of the total (without caudal). Head two-thirds 

 as deep as long. The diameter of the eye is one-fourth of the length 

 of the head, and less than the width of the interorbital space, which 

 is convex, and equals the length of the snout. Snout obtuse, mouth 

 of moderate width, jaws even in front. Suborbital bones very nar- 

 row ; prseorbital as long as deep, much larger than the postorbital, 

 which is not wider than the preceding bone. The origin of the 

 dorsal fin is nearly opposite to that of the ventrals, and midway be- 

 tween the end of the snout and root of the caudal. Caudal fin 

 forked. The pectoral fins terminate at a short distance from the 

 ventrals. Scales much higher than long on the side of the body, 

 and much larger than those on the back and belly. There are three 

 and a half longitudinal series of scales between the lateral line and 

 ventral fin. A more or less conspicuous dark longitudinal band 

 along the side of the tail. (Fins red during the spawning-season.) 



Pharyngeal teeth compressed, hooked, 4 . 2 — 2 . 4. Gill-rakers 

 short, conical, few in number ; the attachment of the gill-membrane 

 to the isthmus takes place opposite the angle of the praeopcrculum. 

 (Head with tubercles in the spawning-season.) 



United States. 



a. Fine specimen. Michigan. Purchased of Mr. Wright. 



h. Half-grown. Flint, Michigan. Presented by Tli. Moore, Esq. 



(^Hypsoleins frontalis.) 

 c-f. Adult. Miami River. Pi;rchased of Mr. Cope. 

 (/. Skins of numerous examples. Lake Erie. Purchased of Mr. 



Parnell. 

 7i-i. Adult (deteriorated by want of food). Montreal. Purchased 



of Mr. Wright. 



