50 THE CYPRINODONTS. 
Mollienisia latipinna. 
Plate V. Fig. 1, teeth; Plate VIII. Fig. 12, male; Plate XII. 
Mollienisia latipinna Les., 1821, J. Phil. Ac., II, p. 3, pl. 3; Wagn., 1828, Isis, XXI, 1056; Rich., 
1837, R. Brit, Assoc., 213; Val., 1840, R. An., ed. ill., Poiss., p. 229, pl. 95, fig. 4, — 1846, C. V. Poiss., 
XVIII, 139, pl. 527; Stor., 1846, Syn., 182, —Mem. Am. Ac., II, 434; Blk., 1860, Cypr., 485, — 1863, 
Atl, IIL, 140; Gth., 1866, Cat., VI, 348; Jor. & C., 1877, B. Buf. Soe., IIT, 143; Jor., 1878, B. U.S. G. 
Sur., IV, 411, 434, 1881, P. U.S. Mus., III, 22, —1885, P. U.S. Mus., VII, 320, 323, —1887, R. 
U.S. F.Com., 838 ; Goode, 1880, P. U. S. Mus., II, 119; G. & B., 1880, P. U.S. Mus., II, 151, 342, — 1883, 
P. U.S. Mus., V, 239; Jor. & G., 1882, B. 16, U. S. Mus., 347, 894, — 1883, P. U. S. Mus., V, 258; Jor. 
& M., 1885, P. U. S. Mus., VII, 235; Gilb., 1890, B. U. S. F. Com., VIII, 228; Hensh., 1891, B. U.S. F. 
Com., [X, 374; Everm., 1892, B. U. 8S. F. Com., X, 88; Woolm., 1892, B. U. S. F. Com., X, 296, 300. 
Pecilia latipinna Put., 1863, B. M. C. Z., 13. 
Pecilia multilineata Les., 1821, J. Phil. Ac., II, p. 4, pl. 1; Wagn., 1828, Isis, XXI, 1055, Rich., 
1857, R. Brit. Assoc., 213; Val., 1846, C. V. Poiss., XVIII, 134; Stor., 1846, Syn., 178,— Mem. Am. 
Ac., I, 430. 
Pecilia lineolata Grd., 1859, P. Phil. Ac., 114, — Mex. Bd. Sur., Fish, 70, pl. 35, fig. 9-11. 
Mollinesia lineolata Jor. & C., 1877, B. Buf. Soc., III, 143; Jor., 1878, B. U. 8. G. Sur., IV, 434; 
Jor. & G., 1882, B. 16, U.S. Mus., 894, —1883, P. U. S. Mus., V, 259; G. & B., 1888, P. U. S. Mus., V, 
239. 
Gambusia lineolata Blk., 1860, Cypr., 485. 
Limia peciloides Grd., 1859, P. Phil. Ac., 115, — Mex. Bd. Sur., Fish, 70, pl. 38, fig. 8-11. 
Gambusia pecilioides, Blk., 1860, Cypr., 485. 
Mollinesia pecilioides Jor. & C., 1877, B. Buf. Soc., III, 143; Jor., 1878, B. U.S. G. Sur., IV, 434. 
Limia formosa Grd., 1859, P. Phil. Ac., 115. 
Mollienesia formosa Gth., 1866, Cat., VI, 349; Jor. & C., 1877, B. Buf. Soc., Til, 143; Jor., 1878, B. 
U.S. G. Sur, IV, 434; Jor. & G., 1882, B, 16 U. S. Mus., 347; Hig., 1898, P. U. S. Mus., XVI, 57. 
Limia matamorensis Grd., 1859, P. Phil. Ac., 116. 
Gambusia matamorensis Blk., 1860, Cypr., 485. 
Mollienesia matamorensis Jor. & C., 1877, B. Buf. Soc., ITI, 143; Jor., 1878, B. U. S. G. Sur., IV, 434. 
B. 5; D. 14-16; A. 10-9; V.6; P. 14-15; Ll. 27-30; Ltr. 9; Vert. 
15+15 to 14+14. 
In the superior aspect the body is much compressed and tapers from the 
head to the caudal; seen from the side body and tail are very deep and the 
head is short wedge-shaped. Head flattened on the crown, less than depth 
of body, nearly one fourth of the length to the base of the caudal. Snout 
broad, short, as long as the eye, or shorter in young, truncate; chin steep. 
Mouth wide, directed upward, lower jaws longer, loosely joined ; upper 
shorter, protractile. Teeth in the outer series slender, movable, narrow at 
the base, widened or oar-shaped and hooked near the crown; inner in bands, 
very small, pointed, hooked. Eye of moderate size, as long as snout or 
longer, half of forehead, about two sevenths of the head. Dorsal longer 
than anal, becoming elongate and high in the males, first ray near the mid- 
dle of the body length in young but nearer the head in old. Anal small, 
origin farther back than that of dorsal, intromittent portion on the male 
shorter than the head and similar to that of Poecilia, advanced between the 
