CYPRINID^E. CVIII. 281 



ff Sides without band, or with merely a dusky shade. 



5. R. lunatus, Cope. FORK-TAILED DACE. Reddish 

 brown, with dusky spots; depth 4^ in length; head 4; 

 lat. 1. GO. Western streams. 



10. PHENACOBIUS, Cope. PHENACOBIES. 



1. P. teretulus, Cope. Head depth, 4f in length; 

 lips plicate; a dusky lateral band; D. I, 8; A. I, 7; 

 lat. 1. 43. Streams of W. Va. 



2. P. u ran ops, Cope. Head 4f in length; depth 6^; 

 lips tuberculate: lat. 1. 60. Holston R. 



//. HYBOPSIS, Agassiz. BLUNT-FACED MINNOWS. 



* Mouth inferior, horizontal, small. 



f Head 5i to 6 times in total length, including caudal fin. (Hud- 

 sonius, Grd.) 



1. H. storerianus, (Kirt.) Ag. STOKER S MINNOW. 

 Silvery, scales with black dots, forming a dark lateral 

 stripe; snout blunt, about as long as eye; depth 5J in 

 length; D. I, 9; A. I, 9; lat. 1. 41. Great Lake region, 

 etc. 



2. H. hudsonius, (Clinton) Putnam. SPAWN -EATER. 

 Silvery, often with dark shades; snout much shorter 

 than eye; depth 4 in length; D. I, 8; A. I, 8; lat. 1. 38. 

 Lakes and rivers; abundant eastward. (Huds.flumatilis 

 and amarus, Grd. H. phae nna, Cope.) 



ff Head 41 tp 5 in length, inclusive of caudal fin. (Hybopsis.) 

 $ Pectoral fins short, not reaching ventrals. 

 a. Lateral line 43 to 45. 



3. H. tuditanus, Cope. Form and coloration of Hybor- 

 hynchus notatus, but said to want the dorsal spine; head 

 broad and blunt. L. Michigan; &quot;a doubtful species,&quot; 

 as are several others in this genus. 



aa. Lat. 1. 36 or 37. 



