CYPBINID^J. CVIII. 285 



15. GILA f Baird and Girard. LEATHER- SIDED MINNOWS. 



* Scales very small; mouth large, very oblique, the lower jaw 

 projecting. (Clinostomus, Grd.) 



1. G. elongata, (Kirt.) Jordan. RED- SIDED MINNOW. 

 Dark bluish, mottled by paler scales; sides with a broad 

 black band, the front half of which is bright crimson in 

 the spring; a dark dorsal stripe; mouth very large, the 

 lower jaw narrowed and projecting farther than in any 

 other of our Dace; a little knob at the tip which over- 

 laps the end of the upper jaw; body much elongated, 

 but little compressed; depth 5 in length; head 4; eye 

 moderate, about 3 in head; D. I, 8; A. I, 8; lat. 1. 65 

 to 70; L. 4. Great Lakes, Ohio Valley, etc.; a hand- 

 some species. (C. proriger, Cope.) 



2. G. vandoisula, (Val.) Jordan. ROSY DACE. A light 

 and a dark lateral band; snout pointed; mandible shorter 

 than in the preceding; eye larger; depth 5 in length; 

 head 4; D. I, 9; A. I, 8; lat. 1. 48. Streams about 

 Chesapeake Bay and S. (C. funduloides, Grd.) 



3. G. affinis, (Grd.) Cope. Body deeper, depth = 

 length of head, 3| in body; eye rather small; D. I, 9; 

 A. I, 8; lat. 1. 46. James R. (C. carolinus, Grd.) 



4. G. margarita, Cope. No lateral band; snout obtuse; 

 depth 5 in length; head 4; lat. 1. 58. Penn. 



16. LYTHRURUS, Jordan. RED- FINS. 

 < Hypsilepis, Cope. 



1. L. diplcemius, (Raf.) Jordan. RED-Fttf. Bright 

 steel blue, with purplish shades, silvery below; a large 

 black spot on the anterior rays of dorsal in front; fins 

 otherwise unicolor, plain olivaceous in $, brilliant brick 

 red in spring males; scales with more or less dark edg- 

 ing; nuptial tubercles minute, very numerous, whitish, 



