118 THE CYPRINODONTS. 
dibles longer, firmly joined; intermaxillaries shorter, protractile. Teeth 
small, in bands, subconical, hooked, outer series larger. Eye large, shorter 
than snout, two sevenths of head, three fifths of interorbital space. Dorsal 
origin about midway from eye to tip of caudal, a trifle backward from the 
first ray of the anal, Anal larger than dorsal, base extending farther for- 
ward and not quite so far back, fin length varying with age and sex. Ven- 
trals small, not reaching the anal. Pectorals small, reaching the bases of the 
ventrals. Median rays of caudal longer ; fin rounded to bluntly pointed. 
Light olivaceous to greenish or yellowish olive, with a band of brown 
or black passing from the snout, through the eye, above the pectoral, to 
the middle of the tail, about one scale and two half-scales in width. Back 
and flanks, to the lower edge of the band, commonly sprinkled with small 
spots of brown. Dorsal, anal, and caudal with smaller spots, to some extent 
forming transverse series. Top of head dark, frequently a light spot on the 
occiput. A light streak along the edge of the dark band on the flank is not 
rare. Below the band, lighter to white. Specimens marked with vertical 
bars of brown on the lower portion of the sides, as in Fig. 10, Plate X, are 
common. On many the spots are more numerous than on Fig. 12 of the 
same plate. 
The variety to which the name zonatus was given by Agassiz, from Michi- 
gan, Wisconsin, Iowa, and Illinois, appears to have more distinct and persis- 
tent vertical bars than the southern representatives. In cases the lateral 
bars are broken into spots, in many the longitudinal band extends out upon 
the caudal. A phase of coloration frequently met with shows the band with 
the bars forming mere serrations or projections on its edges. 
Alabama to Wisconsin, 
This species has been identified by different authors with Semotilus ? 
notatus of Rafinesque. It is, however, impossible to determine from the 
description of that author what he had before him. The following is his 
account : — 
“107th species. Silverspotted chubby. Semotilus? notatus. Semotile taché. 
Breadth one sixth of the length, brownish, pale beneath; head small, obtuse, with 
a large silver spot on the forehead between the eyes, jaws nearly equal; dorsal fin 
opposed to the anal, tail oboval entire. It is found in the Cumberland River, and the 
Little River, a branch of it. Communicated by Mr. Wilkins. It is rather doubtful 
whether it belongs to this genus, or Minnilus, Rutilus, etc. It might perhaps be found 
to constitute a peculiar one by the small mouth without lips, and the posterior dorsal 
