Family V. CypriniD^. 51 



42. Pimelocephales confertus (Girard). 



Hyborhynchus confertus Girard, Proc. Acad. Nat. Sci. Phila., 1856, 



179; Hurrah Creek, tributary of the Rio Pecos, Texas. 

 Pimephales promelas Jordan, Bull. U. S. Geol. Sur., 1878, 402; 



Brownsville, Texas. 

 Pimephales confertus Woolman, Bull. U. S. Fish Comm., 1894, 

 57; Rio Chihuahua, Chihuahua: Jordan & Evermann, Bull. 47, 

 U. S. Nat. Mus., 1896, 217: Meek, Field Col. Mus. Pub. 65, 

 1902, 79; Colonia Juarez; Guzman; Santa Maria; Chihuahua; 

 San Andres; Santa Rosalia; Jimenez; Minaca. 

 Tributaries of the Rio Grande and the Rio Yaqui in northern 

 Mexico and southwestern Texas. 



Head 4; depth 3%'; D. 7; A. 7; scales 12-52 to 55-8. Body 

 robust, head flat above; interorbital width 2\ in head; snout blunt, 

 4 in head ; diameter of eye 3 % in the head ; teeth 4-4 ; origin of dorsal 

 midway between base of caudal fin and nostril; longest dorsal ray 

 1^ in head; pectoral \\ in head; ventral ij/3; scales on anterior 

 and upper part of body very small, about 35 in a series between nape 

 and dorsal fin; lateral line decurved, complete; caudal fin forked; 

 intestinal canal 2^ times length of body. 



Color light olivaceous to nearly black; the very black males have 

 a light vertical bar from base of pectoral to back; a second light bar 

 from first dorsal rays to base of ventrals; pectoral fins black; middle 

 portion of ventral and anal fins very dark; caudal with a dark bar 

 across its middle; all of the fins in the light colored specimens pale. 

 Length about 2% inches. 



Subfamily Mylopharodontinse. 

 1 i). Stypodon Garman. 

 Stypodon Garman, Bull. Mus. Comp. Zool., vm, 1881,90. (Type, 



Stypodon signifer Garman.) 

 Body oblong, compressed, covered with large deciduous scales; 

 mouth small, terminal; premaxillaries protractile; fold of lower lip 

 not crossing the symphysis; lower jaw trenchant, without horny 

 covering; no barbels; pharyngeals strong; teeth 3-3, more or less 

 cylindrical, with rounded grinding surface, the posterior more slender 

 and subconical; lateral line complete, decurved; gill rakers short; 

 dorsal and anal fins short. 



43. Stypodon signifer Garman. 



Stypodon signifer Garman, Bull. Comp. Zool., 1881, 90; Lago de 

 Parras, Coahuila: Jordan & Evermann, Bull. 47, U. S. Nat. 

 Mus., 1806, 220. 



