682 Bulletin ^7, United States National Museum. 



Ganibtisia gracilis,* Girakd, Proc. Ac. Nat. Sci. Phila., 1859, 121, Matamoras, Mexico; name 



preoccupied. 

 Gambmia liumUis, GOntiiek, Cat., vi, 334, 1866; substitute for (jracilix, jirooccupied; Jordan & 



Gilbert, Synopsis, 345, 1883. 

 Haphchilus melannps, Cope, Proc. AiinT. Phil. Soc, 1870, 457, Neuse River, North Carolina. 



(Coll. Cope.) 

 Xiigoiiecles alrilatns, Jordan & Brayton, Bull. U. S. Nat. Mus., xil, 84, 1878, Neuse River, Golds- 



boro. North Carolina; (Coll. Braytou & Gilbert); Jordan & Giluert, Synopsis, 340, 1883. 

 Zygonectes hrach>jplerns,\ Cope, Bull. U. S. Nat. Mus., xx, 34, 1880, Trinity River, Fort 



Worth, Texas; (Coll. Cope); Jordan k Gilbert, Synopsis, 341, 1883. 

 Gamhuaia affinis, GiNTHER, Cat., VI, 330, 1806; GiRARD, Mf x. Bound. Surv., Ichth., 72, pi. 39, figs. 



12-15, 1859; Jordan & Gilbert, Synopsis, 340, 1883; Evermann & Kendall, Bull. U. S. 



Fish Comm., xil, 1892 (1894.) Iu7, i)l. 25, fig. 2. 

 GambiisituHitruelis, GiRARD, Mex. Bound. Surv., Ichth., 72, pi. 39, figs. 1-7, 1859; Jordan & Gil- 

 bert, Synopsis, 340, 1883, 

 Zygotiectes melanops, Jordan, Bull. 111. Lab. Nat. Hist., .52, 1878. 



1001. GAMBUSIA JfOBILIS (Baird & Girard). 



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

 Interorbital space twice ej'e. First ray of dorsal twice as fiir from tip of 

 suout 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 Woolmau in Chihuahua River and represent- 

 ing Gamhusia senilis. A very doubtful species, composed jirobably of over- 

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



Heterandrianobilis, Baird ifeGiRABD, Proc. Ac. Nat. Sci. Phila., 1853, 39ii, Leona and Camanche 

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



Gamhitsiu SL-uihs, Girahi), -Proc. Ac. Nat. Sci. Phila., 1859, 122, Chihuahua River, Mexico; 

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



Zygoiiecles !nnrus,l Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 143, Cache Creek, south- 

 ern Illinois. (Type, No. 29066. Coll. Forbes.) Jordan & Gilbert, Synopsis, 892, 1883. 



Gamhusia nobili'i, Girard, Mex. Bound. Surv., Ichth., 71, pi. 39, fig. 8-11, 1859; Gvnther, Cat., 

 VI, 335, 1866; Jordan & Gilbert, Synopsis, 346, 1883. 



1002. GAMBUSIA NICARAGUENSIS, Giiuther. 



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

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



* Oanibusia gracilia (Girard) : Slender; anal largerthan dorsal, and much anterior to it. Olive; 

 dorsal and caudal with narrow blackish crossbars. Head 4%; D. 6; A. 9. Matamoras.— (iicai-ff. 



t Ziigonectis bracht/pterus, 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, whicli enters 

 the length of the head 23^ times. Color uniform oliviiceous, the scales witli brown edges; 

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

 2 inches." — Cope. 



1 ZijgnneHes inurus, Jordan & Gilbert: Body rather short and deep. Head broad; eye as long 

 as snout, 'Ay, in head, 2 in interorbital width;"tceth in a band, the outerseries scarcely enlarged. 

 FinsKh.irt. "Yellowisli brown; scales darker edged; body without distinct longitudinal stripes 

 or liars; lielly golden; a very conspicuous Jet-black spot just below the eye, and continent wUh 

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

 depth 3^. D. 7; A. 9; scales 28-7. Length i^i inches. Southern Illinois. 



