290 FISHES. 



6. HUDSONIUS,'' Girard. Minnows. 



* Mouth inferior, horizontal, small (rarely oblique, and the teeth 

 4 — 4) ; dorsal over or in front of ventrals. 



f Teeth two-rowed ; body elongate, silvery, the head contained 

 5i to 6 times in total length, including caudal fin ; dorsal 

 fin beginning in front of ventrals; grinding surface of teeth 

 often more or less distorted or even obliterated. {Hudsonius, 

 Grd.) 



1. H. storerianus, (Kirt.) Grd. Stoker's Minnow. 

 Silvery, scales with black dots, forming a dark lateral 

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

 length; D. I, 8; A. I, 7; lat. 1. 41. Great Lake region, 

 etc. 



2. H. fluviaiilis, Grd. Spawn-Eater. Silvery, often 

 with dark shades; snout much shorter than eye, bluntly 

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

 teeth usually 2, 4 — 4, 2. Lakes and rivers; abundant 

 eastward. (Huds. fluviatilis^ Grd.) 



3. H. amarus, (Grd.) " Smelt." Very similar, 

 but paler and with the snout much less decurved, less 

 blunt than the two preceding species; I). I, 7; A. I, 8; 

 lat. 1. 38; teeth usually 1, 4^-4, 1. Penn. to Ga. {H. 

 pluienna^ Cope.) 



ft Teeth 4—4 ; body shorter, small ; head larger, 4i to 5 in length, 

 with caudal fin ; dorsal fin beginning over ventrals ; small 

 species, usually without bright colors. . 

 \ Mouth inferior or horizontal, small. 

 a. Lateral line 43 to 45; a spot on dorsal fin m front. 



4. //. iuditanus, Cope. Form, coloration and dentition 

 of Hyborhynchus notatus^ but with the alimentary canal 



*The name Ifybopsis, usually applied to this genus, was apparently based 

 on a species of Ceratichthys. Alburnops also sometimes used, on species of 

 Luxilus. 



