THE CYPRINODONTS. 101 



little farther forward than that of the anal. Anal base shorter than that of 

 dorsal, opposed, fin rays more often longer and reaching farther back. On 

 large males the anal becomes long, pointed on the lower angle and con- 

 cave on the outer (hinder) margin. Both dorsal and anal vary greatly 

 "with age and sex. Ventrals small, not reaching the anal. Pectorals small, 

 short, broad. Caudal broad, two thirds the length of the head, subtruncate. 

 All fins longer on males. Oviduct produced but little on the first ray of the 

 anal, a prominent flap at each side of the bases of the anterior rays. If 

 straightened the intestine Avould reach to the end of the caudal. 



Olivaceous, puncticulate with brown. Old males become very dark on 

 the upper surfaces. A more or less distinct band of brown along the flanks, 

 fading anteriorly. With or without numerous vertical bars on the flank ; in 

 some cases each bar is broken into three, forming three longitudinal series 

 of spots. Scales commonly darker on their edges. A silvery tint along the 

 sides is not rare. Cheeks and belly with a metallic lustre. Some of the 

 males are very dark, have the dorsal and anal fins considerably elongated, 

 and the borders of these fins light colored, while the middle is crossed by 

 cloudings or a band of black puncticulation. Largest specimen three and 

 three fourths inches in length. 



California and southward. 



Var. labialis has the same coloration, but seems to possess a few more 

 scales and fin rays. The variability of the species is so great, however, that 

 these features are hardly sufficient to distinguish it. 



Guatemala. 



Pundulus adinius. 



Plate II. Fig. 8, teeth. 



Hydrargyra zebra Grd., 1859, P. Phil. Ac, 60 ; Blkr., 1860, Cypr., 48C. 



Fumhdiis zebra Gthr., 1866, Cat., VI, 324 ; Jor. & C, 1877, B. Buf. Soc, III, 141 ; Jor., 1878, B. U. 

 S. G. Surv., IV, 433, 664. 



Fimdiilus {Hydrargyra) zebra Jor. & G., 1882, B. 16 U. S. Mus., 333. 



Fundulus adima Jor. & G., 1882, B. 16 U. S. Mus., 335 ; G. & B., 1883, P. U. S. Mus., V, 230 ; Jor., 

 1887, Rep. U. S. F. Com., 837. 



Fundulus zebnnm Jor. & G., 1882, B. 16, U. S. Mus., 891 ; Evcmi. & K., 1894, B. U. S. F. Com., 1892, 

 76, 77, 83, 89, 92, 106. 



Fundulus extetims Jor. & G., 1883, P. U. S. Mus., V, 355 ; Jor., 1886, P. U. S. Mus., VIII, 368,— 

 1887, R. U. S. r. Com., 837. 



Fundulus diaphanus Cope, 1880, B. 20, U. S. Mus., 33; Everm. & K., 1894, B. U. S. F. Com., 1892, 

 83, 90, 92, 106, pi. 23, fig. 3, 4. 



Fundulus ? multifasciatus Cope & Y., 1875, Wheel. Exp. Zool., V, 695. 



B. 5 ; D. 14 ; A. 14 ; V. 6 ; P. 17 ; LI. 48 ; Ltr. 15; Vert. 15+18. 



