42 Field Columbian Museum — Zoology, Vol. V. 



series between nape and dorsal fin; longest dorsal ray if in head; 

 pectoral i^ in head; ventrals i| in head; caudal forked; lateral line 

 nearly complete, usually absent on about last 10 scales; males in the 

 spring with large tubercles on head and body. 



Color brownish with a brassy luster above ; the scales more or less 

 mottled with dark; sides much and irregularly mottled with darker; 

 small specimens with a fairly well developed lateral band, and an in- 

 distinct caudal spot ; a broad black band across the base of the dorsal 

 fin; all other fins plain. Length about 4^2 inches. 



Ovaries in females, taken the latter part of May, not enough 

 developed to give a definite idea as to the time of spawning. One 

 specimen taken at Santiago Papasquiaro. 



33. Campostoma anomalum (Rafinesque). Stone-roller. 

 Rutilus anomalus Rafinesque, Ichth. Ohiensis, 52, 1820; Licking 



River, Kentucky. 



Campostoma nasutum Girard, Proc. Acad. Nat. Sci. Phila., 1856, 

 176; Cadereita and Acapulco, Nuevo Leon. 



Campostoma dubium Gunther, Cat., vn, 183, 1868. 



Campostoma anomalum Jordan & Evermann, Bull. 47, U. S. Nat. 

 Mus., 1896, 205. 



Rivers of the Mississippi Valley south to the Rio San Juan in 

 northeastern Mexico. (San Juan; Montemorelos.) 



Head 4 to 4^; depth 4! ; D. 8; A. 7 or 8; scales 7-53-8. Body 

 stoutish, moderately compressed, the antedorsal region becoming 

 swollen and prominent in large specimens; head moderate; the snout 

 moderately decurved and pointed, its length 2% in head; diameter 

 of eye 4! in head; maxillary not reaching vertical from anterior 

 margin of orbit; 22 to 25 scales in a series between nape and dorsal 

 fin; longest dorsal ray ij4 in head; length of pectoral i){ in head; 

 ventral if in head; caudal fin forked; lateral line complete; males 

 in the spring with tubercles on snout and body. 



Color brownish, much mottled with darker; a broad black band 

 across the base of the dorsal fin; other fins plain; small specimens 

 have a well-defined lateral band and a small black caudal spot. 

 Length 6 to 8 inches. 



34. Campostoma formosulum Girard. 



Campostoma formosulum Girard, Proc. Acad. Nat. Sci. Phila., 

 1856, 176; Rio Sabinal, near San Antonio, Texas: Jordan, 

 Bull. U. S. Geol. Sur., 1878, 401; Rio Grande, Brownsville, 

 Texas: Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1896, 

 206. 



