84 THE CYPRINODONTS. 



Gambusia patruelis. 



Heterandria patruelis B. & G., 1854, P. Phil. Ac, VI, 390. 



Gambusia patruelis Grd., 1859, P. Phil. Ac, 121, — Mex. Bd. Sur., Fishes, 72, pi. 39, fig. 1-7; Jor. 

 & C 1S77 B Buf. Soc, III, 142 ; Jor., 1878. B. U. S. G. Sur., IV, 434, - 1885, P. U. S. Mus., VII, 320, 

 — 1887 r! U. S. F. Com., 338 ; Garm., 1881, B. M. G. Z., VIII, 93 ; Hay, 1883, B. U. S. F. Com., 11, 66, 74 ; 

 G & B.', 1883, P. U. S. Mus., V, 239 ; Jor. & G., 1882, B. 16 U. S. Mus., 345,-1883, P. U. S. Mus., V, 

 257, — 1887, P. U. S. Mus., IX, 8, 11, 14, 16, 17, 19, 21, 22, 24; Woolm., 1892, B. U. S. F. Com., X, 

 263, 273; Everm., 1892, B. U. S. F. Com., 1891, p. 88 ; Garm., 1894, B. Essex Inst., XXVI, ext. p. 47; 

 Eig., 1894, B. Ind. Biol. Surv., 94. 



Zygonectes ftalruelis Blk., 1800, Cypr., 486. 



Heterandria affiuis B.& G., 1854, P. Phil. Ac, VI, 390; Blk., 1860, Cypr., 485. 



Gambusia affinis Grd., 1859, P. Phil. Ac, 120, — Mex. Bd. Fish, 72, pi. 39, fig. 12-15; Blk., 1860, 

 Cypr., 485 ; Gth., 1866, Cat., VI, 336 ; Jor. & C, 1877, B, Buf. Soc, III, 142 ; Jor., 1878, B. U. S. G. Sur., 

 IV, 434,-1887, R. U. S. F. Com., 838; Jor. & G., 1882, B. 16 U. S. Mus., 346; Everm. & K., 1894. 

 B. U. S.' F. Cora., 1892, pp. 66, 75, 76, 78, 79, 81, 83, 87, 89, 90, 92, 107, pi 25, fig. 2. 



Gambusia gracilis Grd., 1859, P. PhU. Ac, 121 ; Trosoh, 1865, Verz. Wirb. Mex., 107 ; Jor. & C, 1877, 

 B. Buf. Soc, III, 143; Eig., 1893, P. U. S. Mus., XVI, 57. 



Zygonectes gracilis Blk., 1S60, Cypr., 486. 



Gambusia humilis Gth., 1866, Gat., VI, 335, Jor. & G., 1882, B. 16 U. S, Mus., 345 ; Jor., 1887, R. U. 

 S. F. Com., 838. 



Gambusia holbrooUi Jor. & C, 1877, B. Buf. Soc, III, 142; Jor., 1878, B. U. S. G. Sur., IV, 433. 



Zygonectes (Micristius) brachyiHerus (Cope) Jor., 1878, B. U. S. G. Sur., IV, 433 ; Jor. & G., 1882, B. 

 16 U. S. Mus., 341. 



Zygonectes brachypterus Cope, 1880, B. 20 U. S. Mus., 34. 



B. 6 ; D. 7 ; A. 10 ; V. G ; P. 12-13 ; LI. 30-31 ; Ltr. 9 ; Vert. 14 + 19. 



This species is distinguished from G. HolbrooUi by a larger eye and a 

 smaller dorsal fin. In outlines, squamation, and dentition, the two agree. 

 The coloration of G. patruelis is lighter, has less of the brown, and possibly is 

 more brilliant in life. The spots on the fins, and that below the eye, are 

 fainter or more often absent than in G. HolbrooUi. A faint silvery band 

 along each flank is very common. 



The eye is large, longer than the snout, two thirds of the interorbital 

 space and two fifths to one third of the head. The normal number of dorsal 

 rays appears to be seven, eight is rare, but frequently, especially in males, 

 there are but six. In G. HolbrooUi normally there are eight dorsal rays, 

 rarely seven or nine. The variety gracilis does not differ in the number of 

 fin rays, or of scales, but apparently is a trifle more slender and more uni- 

 form in coloration. Specimens from the Arkansas and from St. Louis do not 

 differ noticeably from those secured in Texas, Louisiana, and Mississippi. 



