APPENDIX F. FISHES. 223 



not quite reaching the insertion of the ventrals. They are composed of 

 eleven slender, bifurcated, but not subdivided, rays. The median rays 

 of the dorsal, caudal, anal, and ventrals, are subdivided for at least one- 

 fourth of their length, the bifurcation beginning sometimes upon their 

 middle. Formula : 



D 8 + 1 ; A 1. 9 ; C 2. 1. 9. 8. 1. 1 ; V 8 ; P 11. 



The scales are proportionally large, higher than long ; anterior, supe- 

 rior, and inferior margins, uniformly rounded, posteriorly subtruncated. 

 The lateral line is considerably bent down on the abdomen, and slightly 

 broken in advance of the anal fin. 



The ground-color, as preserved in alcohol, is dull bluish brown ; the 

 back is bluish ; the dorsal fin yellowish brown ; the caudal, pectorals, 

 and ventrals, are reddish. 



Several specimens were caught in Otter creek, Arkansas ; the largest 

 of which we have had figured. 



Plate XIV, fig. 9, Leuciscus lutrensis size of life. 



Fig. 10. A dorsal scale from the middle of the region between the 

 dorsal fin and the lateral line. 



Fig. 11. A scale of the lateral line taken beneath the dorsal fin. 



Fig. 12. An abdominal scale taken beneath the lateral line, half way 

 between the latter and the line of the belly. 



