of). XEUCISCL'S. 245 



49. Leuciscus formosus. 



Algansea formosa, Girard, Proc. Ac. Nat. Sc. Phihul 186G, p. 183 5 

 and U. S. ^- Pac. R. R. Expcd. Fish. p. 239. 



D. 2/8. A. 2/8. 



Ten longitudinal scries of scales between the origin of tlic dorsal 

 fin and the lateral line, and seven between the lateral line and the root 

 of the ventrals. The length of the head is one-fourth of the total 

 (with the caudal), the height of the body one-fifth. Tlic diameter 

 of the eye is one-fifth of the length of the head. The maxillary 

 does not reach the vertical from the front margin of the orbit. The 

 origin of the dorsal fin is midway between the end of the snout and 

 the root of the caudal. Sometimes with small black spots. 



Pharyngeal teeth 4 or 5 — 5 or 4, cultriform. (Girard.) 



California. 



50. Leuciscus bicolor. 



Algansea bicolor, Girard, Proc. Ac. Nat. Sc. Philnd. 185G, p. 183 ; 

 aud U. S. 8,- Pac. R. R. Exped. Fish. p. 238, 



D. 1/9. A. 1/9. 



Nine longitudinal series of scales between the origin of the dorsal 

 fin and the lateral line, and five between the lateral line and the root of 

 the ventrals. The length of the head is two-ninths of the total (with 

 the caudal), the diameter of the ej'e two-ninths of the leigth of the 

 head. The maxillary does not reach the vertical from the front 

 margin of the orbit. The origin of the dorsal fin is somewhat be- 

 hind that of the ventrals, and nearer to the root of the caudal than to 

 the end of the snout. Coloration uniform. 



Pharyngeal teeth 4 or 5 — 5 or 4, cultriform. (Girard.) 



Klamath Lake, Oregon. 



2. The dorsal Jin coinincMes behind ilie root of the ventrals. Rudimcntat 

 caudal rays not umisualli/ developed. 



a. P'wryngeal teeth in two series. 



aa. Lateral line complete ; jiharytu/eal teeth 5 or 4 , 2 — 2 . 5 or 4 



(Clinostomus). 



51. Leuciscus elongatus. 



Luxilus elongaiiis, Kirtland, Rcj). Zool. Ohio, pp. 1G9, 192 j aud Bost. 



Journ. Nat. Hist. iii. p. 339, pi. 4. fig. 1. 

 Leuciscus elongatus, Storcr, Synoj^s. p. 101 ; Cia: ^' Tal. xvii. p. 494. 



productus, Storer, Synops. p. 104. 



Gliuostomus elongatus, Girard, Proc. Ac. Nat. Sc. Philad. 1850, p. 212, 



D. 9. A. 10. V. 9. L. lat. 72. L. transv. 12/11. 

 The height of the body is contained five times in the total length 

 (without caudal), the length of "the head tluicc and four-fifths. 

 Head not twice as long as deep, fiat above ; the widtli of the inter- 

 orbital space is a little less than the length of the snout. The 

 diameter of th3 eye is contained thrice and two-thh'ds in the length 

 of the head, arid rather less than that of the snout. Mouth ublique, 



