ETHEOSTOMATXDuE. — LXXXIX. 227 



inches. Mississippi Valley, abundant; the most gaily 

 colored of all the Darters. 



2. P. spectabilis, Ag. Stbiped Blue Daetbe. Like 

 the preceding and equally brilliant, but larger and more 

 compressed, and more elongate; back with distinct black- 

 ish stripes along the rows of scales, pattern of coloration 

 similar, but the colors having a clear or bleached appear- 



, ance; with the other, but less abundant; often found in 

 muddy water where P. variattts never ventures. 



3. P. j'essicB, Jordan and Brayton. Southekn Blue 

 Daetee. Cheeks scaly above — not entirely naked as in 

 the two preceding species; lateral line extending to end 

 of second dorsal — farther than in either of the preceding 

 species; chestnut colored above, with squarish blotches 

 of a dark, clear blue on the sides; fins mottled with chest- 

 nut or golden; D. XII — 12; A. 11,9. Tennessee River. 



15. ETHEOSTOMA, Rafinesque. Steipbd Daetbes. 



{Caionotus, Agassiz.) 



* Head entirely scaleless; lateral line short; lower jaw longest. 



1. E. flabef/ar/s, Ra,i. Fan -Tailed Daetee. Oliva- 

 ceous, dusky above; sides with obscure dusky bars; each 

 scale with a brownish spot, these sometimes forming 

 series of longitudinal lines but never veri/ distinct ones; 

 head narrow; mouth oblique; body rather slender; fins 

 strongly barred; D. VIII — 12; A. II, 8; length 2i inches. 

 Great Lakes and streams from N. Y., S. and W., abund- 

 ant. {£!. Unsleyi, H. R. Storer. Oligocephalits humer- 

 alis and Gatonotus ■fasciatus, Girard.) 



2. E. lineolaia, (Ag.) Jor. Steiped Daetee. Oliva- 

 ceous, each scale with a black spot, hence the body with 

 a series of fine dotted longitudinal lines which are very 

 distinct above; some (??) further marked with dark cross 



