682 Bulletin 47, United States National Museum. 



Gambusia gracilis,* GIBABD, Proc. Ac. Nat. Sci. Phila., 1859, 121, Matamoras, Mexico; 



preoccupied. 

 Gambiisia humilis, GdNTHER, Cat., vi, 334, 1866; substitute for gracilis, preoccupied; JORDAN <fe 



GILBERT, Synopsis, 345, 1883. 

 Haplochilus melanops, COPE, Proc. Amer. Phil. Soc., 1870, 457, Neuse River, North Carolina. 



(Coll. Cope.) 

 Zygonectes atrilaius, JORDAN & BRAYTON, Bull. U. S. Nat. Mus., xn, 84, 1878, Neuse River, Golds- 



boro, North Carolina; (Coll. Brayton & Gilbert); JORDAN & GILBERT, Synopsis, 340, 1883. 

 Zygonectes brachypterusrf COPE, Bull. U. S. Nat. Mus., xx, 34, 1880, Trinity River, Fort 



Worth, Texas; (Coll. Cope); JORDAN & GILBERT, Synopsis, 341, 1883. 

 Gambusia afflnis, GUNTHER, Cat., vi, 336, 1866; GIRARD, Mex. Bound. Surv., Ichth., 72, pi. 39, figs. 



12-15, 1859; JORDAN & GILBERT, Synopsis, 346, 1883; EVERMANN & KENDALL, Bull. U.S. 



Fish Comm., xn, 1892 (1894.) 107, pi. 25, fig. 2. 



Gambusi a patruelis, GIRARD, Mex. -Bound. Surv., Ichth., 72, pi. 39, figs. 1-7, 1859; JORDAN & GIL- 

 BERT, Synopsis, 346, 1883. 

 Zygonectes melanops, JORDAN, Bull. 111. Lab. Nat. Hist., 52, 1878. 



1001. GAMBUSIA NOBILIS (Baird & Girard). 



Head 2 ; depth 3. D. 9 ; A. 10 ; scales 30-7. Teeth in broad bands. 

 Interorbital space twice eye. First ray of dorsal twice as far from tip of 

 snout as from base of caudal. Color light brown, punctate above by brown 

 dots; breast orange; abdomen yellow; a faint dark band as broad as 

 eye running along sides to root of caudal; a dusky band running down 

 and back from eye across the cheek; a dark oblique band of dark points 

 from gill opening to anal. Scales on upper part of body edged with 

 brown. Length 2 inches. Southern Illinois to the Rio Grande region, 

 our specimens collected by Woolman in Chihuahua River and represent- 

 ing Gambusia senilis. A very doubtful species, composed probably of over- 

 grown examples of Gambusia affinis. (nobilis, noble.) 



Helerandrianobilis, BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1853, 390, Leonaand Camanche 

 Spring, Rio Grande Del Norte. (Coll. Clark.) 



Gambusia senilis, GIRARD, Proc. Ac. Nat. Sci. Phila., 1859, 122, Chihuahua River, Mexico; 

 D. 9; A. 10 ; size large. (Coll. John Potts.) 



Zygonectes inurus,$ JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1882, 143, Cache Creek, south- 

 ern Illinois. (Type, No. 29666. Coll. Forbes.) JORDAN & GILBERT, Synopsis, 892, 1883. 



Gambusia nobilis, GIRARD, Mex. Bound. Surv., Ichth., 71, pi. 39, fig. 8-11, 1859; GONTHER, Cat., 

 vi, 335, 1866; JORDAN & GILBERT, Synopsis, 346, 1883. 



1002. GAMBUSIA NICARAGUENSIS, Gunther. 



Head 3f; depth 3. D. 8 ; A. 10; scales 29-8. Snout broad, sub- 

 spatulate, the lower jaw projecting beyond upper. Eye a little more than 



* Gambusia gracilis (GIRARD) : Slender; anal larger than dorsal, and much anterior to it. Olive; 

 dorsal and caudal with narrow blackish crossbars. Head 4%; D. 6; A. 9. Matamoras. Girard. 



t Zygonectes brachypterus, COPE: "Base of the first dorsal ray behind the vertical line equally 

 dividing the base of the anal; ventrals not reaching base of anal. Scales large. Head wide, 

 with overhanging supercilia; interorbital width twice the diameter of the orbit, which enters 

 the length of the head 2% times. Color uniform olivaceous, the scales with brown edges; 

 cheeks silvery; no spots on the head. Body stout. Head 4%; D. 7; A. 8; scales 30-9. Length 

 2 inches." Cope. 



| Zygonectes inurus, JORDAN & GILBERT: Body rather short and deep. Head broad ; eye as long 

 as snout, 3% in head, 2 in interorbital width; teeth in a band, the outer series scarcely enlarged. 

 Fins short. Yellowish brown; scales darker edged; body without distinct longitudinal stripes 

 or bars; belly golden; a very conspicuous jet-black spot just below the eye, and confluent with 

 it in the adult; dorsal and caudal fins with series of blak dots; caudal very large. Head 3%; 

 depth 3%. D. 7; A. 9; scales 28-7. Length 2> inches. Southern Illinois. 



