FAMILY V. CYPRINID.E. 77 



Phenacobius scopifer Jordan, Bull. U. S. Geol. Sur., 1878, 666; 

 Brownsville, Texas: Jordan & Evermann, Bull. 47, U. S. Nat. 

 Mus., 1896, 302. 



Mouth of the Rio Grande north to St. Joseph, Missouri. 



Head 4 to 4^; depth 4^; D. 8; A. 7; scales 6-43-5. Body 

 moderately slender; head short; snout rather blunt; mouth small; 

 dorsal fin in front of ventrals. 



Color olivaceous, a silvery lateral band, and a black caudal spot; 

 edges of scales' with dark edgings, which sharply define their outlines. 

 Length about 3 inches. 



29. Evarra Woolman. 



Evarra Woolman, Bull. U. S. Fish Comm., 1894, 64. (Type, Evarra 

 eigenmanni Woolman.) 



Body very elongate, slender, subterete; head small; snout bluntish; 

 mouth small, terminal, oblique; no barbels; the lips thickish; upper 

 jaw protractile; lateral line complete; dorsal fin low ; teeth small 4-4 ; 

 alimentary canal about as long as body. 



To this genus belong 2 species which are known only from the 

 lakes and canals near the City of Mexico. 



KEY TO THE SPECIES OF EVARRA. 



a. Anal fin short, with about 7 rays; scales about PAGE 



88 in the lateral series eigenmanni 7 7 



aa. Anal fin long, with 14 rays; scales 95 in lateral 



series tlahuacensis 78 



71. Evarra eigenmanni Woolman. 



Evarra eigenmanni Woolman, Bull. U. S. Fish Comm., 1894, 64; 



City of Mexico: Jordan & Evermann, Bull. 47, U. S. Nat. 



Mus., 1896, 304: Meek, Field Col. Mus. Pub. 65, 1902, 86; 



Tlahuac. 

 Valley of Mexico. 



FIG. 23. EVARRA EIGENMANNI Woolman. 



No. 45571, U. S. National Museum. 



