CYPRIKID^E. CVIII. 287 



the young often need close attention. (Plarcjyrus typi- 

 cus, Grd.; L. chrysocephalus, Raf.; L. diplemius and 

 plargyrus, Kirt.; Leuciscus frontalis, Ag., a stout variety 

 from the Great Lakes.) 



2. L coccogenis, (Cope) Jordan. RED -CHEEKED 

 SHINER. Steel blue, sides silvery; dorsal, caudal, and 

 pectorals red in the male; adults of both sexes with the 

 upper jaw, base of dorsal, and a vertical streak down the 

 cheeks, bright orange red, the latter mark appearing like 

 a brand; dorsal and caudal with a broad dusky bar; 

 slimmer than cornutus , depth 4^- in length, about equal 

 to length of head; mouth very oblique, the lower jaw 

 projecting (excepting in tuberculate males); D. I, 7; 

 A. I, 9; lat. 1. 42. Head waters of the Tennessee R., 

 abundant; a beautiful and very distinct species. 



18. PLARGYRUS, Rafinesque. SILVER FINS. 



&amp;lt; MutiluS) Raf. (= Leuciscus^ Klein, European.) 



&amp;lt; Hypsilepis, Cope. 



* Fins and lower parts with milk-white pigment in spring, never 

 red ; dorsal with a large black spot on the last rays, about 

 half way up (an important feature); upper jaw projecting in 

 closed mouth ; eye rather small ; species of rather small size ; 

 &quot; Silver-Fins.&quot; 



1. P. galacturus, (Cope) Jordan. MILKY -TAILED 

 SHINER. SLENDER SILVER - FIN. Bluish above, sides 

 bright silvery, with bright reflections; head 4^ in length; 

 depth 4f ; mouth large, nearly horizontal; body slender, 

 more elongated and less compressed than in the next; 

 scales smooth and firm, usually with dusky edges; D. I, 

 8; A. I, 8; lat. 1. 40; L. 5. Ohio Valley and S., 

 abundant. Resembles the next, but larger, and with a 

 larger mouth. 



