152 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



dorsal and anal pale orange, with many small round black dots; lower 

 fins, pale; color of female similar to male, but paler; no cross bands; 

 a faint dark spot behind pectoral ; caudal nearly plain ; dorsal and anal 

 less spotted than in the male. Length about 3 inches. 



143. Poecilia presidionis Jordan & Culver. 



Pcecilia presidionis Jordan & Culver, Proc. Cal. Acad. Sci., 1895, 

 413, pi. 29; Rio Preside, Sinaloa: Jordan & Evermann, Bull. 

 47, U. S. Nat. Mus., 1896, 697 ; Rio Presidio, Sinaloa. 



Fresh and brackish waters of Sinaloa. 



Head 4^; depth 3^ to 4^; D. 7 or 8; A. 7; scales 9-28. Body 

 rather elongate, the profile scarcely rising in front of the dorsal fin; 

 interorbital space broad, 2 in head; diameter of the eye equals the 

 length of the snout, 3^ in head; teeth small, in two well separated 

 series; those of the inner row small, close set; origin of dorsal fin nearer 

 tip of caudal than tip of snout ; middle of dorsal over origin of anal (?) ; 

 fins all low and short; longest dorsal ray iX in head; pectoral iX m 

 head; caudal truncate. 



Color (?) green sh above ; sides with violet sheen ; 3 or 4 black 

 cross-bars usually very distinct, sometimes obsolete in large examples; 

 one or two oblong spots before these in the place of other bars; last 

 ray of the dorsal with a trace of a dark ocellus; fins otherwise plain; 

 males without cross-bars and with the lower fins reddish. 



144. Poecilia couchiana (Girard). 



Limia couchiana Girard, Proc. Acad. Nat. Sci. Phila., 1859, 116; 

 Rio San Juan at Cadereita, near Monterey, Nuevo Leon. 



Poecilia couchiana Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 

 1896, 695. 



Headwaters of the Rio San Juan, near Monterey, very abundant 

 in a large spring in the city of Monterey. (Monterey.) 



Head 3f; depth 3; D. 9; A. 7 or 8; scales 10-27. Body robust, 

 moderately compressed; back moderately elevated, head small, inter- 

 orbital if in head; teeth loose, in one series; snout 3X1 eve 3; origin 

 of dorsal fin much in advance of anal, midway between base of caudal 

 and eye; pectoral fin T.% in head; ventral if in head; caudal fin 

 rounded; caudal peduncle iX m head; alimentary canal elongate, 

 coiled on the right side. 



Color dark brownish on upper two-thirds of body; below white, 

 with a few black specks; each scale on upper half of body with light 

 centers. Length about i^ inches. 



One female 1.75 inches in length contained 22 eggs. The young 

 are probably born early in June. 



