FAMILY XL PCECILIID.E. 131 



Gambusia nobilis Girard, Mex. Bd. Sur., 71, pi. xxxix, figs. 

 8 ii, 1859; Comanche Spring: Woolman, Bull. U. S. Fish 

 Comm., 1894, 60; Rio Chihuahua, Chihuahua. 

 Gambusia speciosa Girard, Proc. Acad. Nat. Sci. Phila., 1859, 121; 

 Rio San Diego, a tributary of Rio San Juan near Cadereita, 

 Nuevo Leon. 

 Gambusia gracilis Girard, Proc. Acad. Nat. Sci. Phila., 1859, 121; 



Matamoras. 

 Gambusia senilis Girard, Proc. Acad. Nat. Sci. Phila., 1859, 122; 



Rio Chihuahua, Chihuahua. 



Gambusia patruelis Garman, Bull. Mus. Comp. Zool., 1881, 93; 

 Monclova, Mexico: Garman, Memoirs, Mus. Comp. Zool., 1895, 

 84; Mexico. 



Gambusia affinis Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 

 1896, 680: Jordan & Snyder, Bull. U. S. Fish Comm., 

 1900, 127; lagoons near Tampico: Meek, Field Col. Mus. Pub. 

 65, 1902, 98; Jimenez; Santa Rosalia; Chihuahua; San Andres. 

 Lowland streams of the south Atlantic states and Gulf coasts to 

 the Rio Panuco and to the Rio Conchos in Chihuahua. (Sauz; Mon- 

 terey; Garza Valdez; La Cruz; Santa Engracia; Forlon; Valles.) 



Head 3^ to 4; depth 3^ to 4; D. 7 or 8; A. 8; scales 9-32. Body 

 rather robust, not much compressed; head rather large, flat .above, 

 interorbital 2 in head; snout 3 in head; lower jaw the longer; teeth in 

 jaws in bands, the outer series enlarged; diameter of eye 3 in head; 

 origin of dorsal fin o\nr middle of last ray of anal, its distance from 

 base of caudal i % in its distance to tip of snout ; pectoral i % in head ; 

 ventrals 2% in head; caudal fin truncate; least depth of caudal 

 peduncle iX m head; alimentary canal about as long as the body; 

 peritoneum dusky. 



Color light olive, edges of scales dark; a faint dark lateral streak or 

 dusky band on sides ; sides and belly dusted with black dots ; a narrow 

 band downward and backward from eye; occasionally some dark on 

 anal fin; other fins plain. Length about 2 inches. 



One female 1.6 inches in length, collected the last week in May, 

 contained 22 eggs, eye spots not formed. 



121. Gambusia infans Woolman. 



Gambusia infans Woolman, Bull. U. S. Fish Comm., 1894, 62, pi. 2, 

 fig. 3; Rio Lerma, Salamanca, Guanajuato: Jordan & Ever- 

 mann, Bull. 47, U. S. Nat. Mus., 1896, 680: Meek, Field Col. 

 Mus. Pub. 65, 1902, 99; Celaya; Ocotlan; La Barca; Huingo. 

 Gambiisia affinis Pellegrin, Bull. Mus. Hist. Nat. Paris, 1901, 205; 

 Lago de Zacoalco, Estado de Jalisco. 



