20 THE CYPRINODONTS. 
Form robust, short and deep; body and head compressed ; back arched ; 
crown flattened; snout short, blunt; caudal pedicel deep. Mouth of moder- 
ate size, obliquely directed upward; lower jaws longer, firmly united ; upper 
short, protractile. Teeth in a single series in each jaw, compressed and 
broadened toward the crowns, tricuspid. Guill membranes united, free from 
the isthmus. Branchiostegal rays six to five. Origin of the dorsal fin in the 
anterior half of the length, forward of that of the anal. First ray of dorsal 
large and strong. Anal unmodified in the male. Ventrals small. Caudal 
large, deep. Intestine long, much convolute. Species small, hardly as much 
as two inches in length. 
United States to Brazil; Cuba. 
Cyprinodon variegatus. 
Plate I, Fig. 1 & 2, teeth. 
Cyprinodon variegatus LaC., 1803, Poiss., V, 486, pl. 15, f. 3; Flem., 1822, Phil. Zool., II, 386; 
Cuv., 1829, R. An., II, 281,—1836, R. An., I, 533; Val., 1828, Humb. Obs., I, 165, —1846, C. V. 
Poiss., XVIII, 173; Wagn., 1828, Isis, XXI, 1057; Stor., 1846, Syn., 183, —Mem. Am. Ac., 435, — 
1867, Fish. Mass., 279; Blk., 1860, Cypr., 484, — 1863, Atl., III, 139; Gill, 1861, N. A. Fish, 51,— 
1873, N. A. Fish, 31; Gth., 1866, Cat., VI, 305; Bd., 1873, R. U.S. F. Com., I, 826; Jor. & C., 1877, 
B. Buf. Soc., III, 141; Yarr., 1877, P. Phil. Ac., 214; Jor., 1878, B. U. S., G. Sur., IV, 411, 482, — 1885, 
P. U. S. Mus., VII, 322, —1887, P. U. S. Mus., IX, 96,—R. U. S. F. Com., 835; Jor. & G., 1879, 
P. U. S. Mus., I, 384, —1882, B. 16 U.S. Mus., 329, —1883, P. U. S. Mus., V, 250, —1887, P. U.S. 
Mus., IX, 26; Goode, 1880, P. U. S. Mus., II, 117; G & B., 1880, P. U. S. Mus., Il, 151, —1883, 
P. U. S. Mus., V, 239; Bean, 1881, P. U. S. Mus., IIT, 104, —1889, B. U.S. F. Com., 132, 148, —1892, 
P. U.S. Mus., XIV, 92; Jor. & E.,1888, P. U. S. Mus., X, 269; Hensh., 1891, B. U.S. F. Com., IX, 374; 
Smith, 1892, B. U. S. F. Com., X, 64, pl. 18, f. 1, 2 
Le Cyprinodon varié Cuv., 1817, R. An., II, 199. 
Esox ovinus Mitch., 1815, Tr. L. & P. Soc. N. Y., I, 441, pl. 4, f. 7. 
Pecilia (Cyprinodon) variegatus Goldf., 1820, Handb., II, 17. 
Lebias rhomboidalis Val., 1828, Humb. Obs., II, 160, pl. 51, f. 3 & 7; Wagn., 1828, Isis., XXT, 1055; 
Guer., 1888, Icon., Poiss., 28. 
Cyprinodon ovinus Val., 1828, Humb. Obs., II, 164; Wagn., 1828, Isis, XXI, 1056; Rich., 1837, 
Sixth R. Br. Assoc., 213; Bd. 1855, Ninth R. S. Inst., Extr. p. 31. 
Lebias ovinus DeK., 1840, N. Y. G. Sur., 29, — 1842, Fish N. Y., 215, pl. 27, f. 84. 
Lebia ellipsoidea Les., 1821, J. Phil. Ac., II, p. 5, pl. 2, f. 1-8; Rich., 1837, Sixth R. Br. Assoc., 218. 
Lebias ellipsoides DeK., 1842, Fish N. Y., 216; Ayres, 1843, J. B. N. H. Soc., IV, 265; Stor., 1846, 
Syn., 179, —Mem. Am. Ac., IT, 431. 
Var. gibbosus. 
Cyprinodon gibbosus B. & G., 1854, P. Phil. Ac., VI, 1853, p. 390; Grd., 1859, Mex. Bd. Sur., Fish, 
67, pl. 38, f. 1-7; Blk., 1860, Cypr., 484; Jor. & C., 1877, B. Buf. Soc., IIT, 141; Jor., 1878, B. U.S. 
G. Sur., IV, 432; Jor. & G., B. 16 U. S. Mus., 329; G. & B., 1883, P. U. S. Mus., V, 239 
Cyprinodon Riverendi Jor., 1885, P. U. S. Mus., VII, 109, 147. 
Cyprinodon variegatus gibbosus Jor., 1887, R. U. S. F. Com., 835. 
Cyprinodon variegatus Everm., 1893, B. U. S. F. Com., 1891, p. 84; Everm. & K., 1894, B. U.S. F- 
Com., 1892, pp. 66, 75, 79, 83, 87, 89, 92, 106, pl. 22, f. 2, 3. 
Var. Riverendi. 
Trifarcius Riverendi Poey, 1861, Mem., II, 306, 383, —1868, Repert., II, 411, —1876, An. Soc. Esp., 
V, 140. 
Trifarcius Felicianus Poey, 1868, Repert., II, 412, — 1876, An. Soc. Esp., V, 140. 
