THE CYPRINODONTS. 93 
HAPLOCHILIN. 
LUCANIA. 
Lucania Grd., 1859, P. Phil. Ac., 118; Blkr., 1860, Cypr., 481,— 1863, Atl. Ichth., IJ, 139; Gthr., 
1866, Cat., VI, 309; Jor. & G., 1882, B. 16 U. S. Mus., 342. 
Head and body compressed ; caudal section moderately deep. Head 
short, crown little arched; snout short, blunt; chin steep. Mouth small, 
narrow. Teeth conical, in a single series in each jaw. Caudal large, other 
fins small. Dorsal origin near the middle of the length to the caudal, for- 
ward from that of anal. Anal fin not modified in the male. Scales large, 
smooth to the touch. Intestine short. 
Differing from the typical Funduli in the compressed anterior half of the 
body, and especially in having but a single series of teeth in each jaw. The 
shape of the teeth is similar in the two genera. 
Lucania parva. 
Plate III, Fig. 5, teeth. 
Cyprinodon parcus Ba., 1855, Ninth Rep., S. I., 345, extr. p. 31; Blkr., 1860, Cypr., 484; Gill, 1861, 
Cat. N. A. Fish, 51, — 1873, Cat. N. A. Fish, 31; Gthr., 1866, Cat., VI, 307; Jor. & C., 1877, B. Buf. 
Soc., ITI, 141; Jor., 1878, B. U.S. Geol. Surv., IV, 432. 
Limia cenusta Grd., 1859, Mex. Bd., Fish, 71, pl. 39, fig. 20-23. 
Lucania venusta Grd., 1859, P. Phil. Ac., 118; Blkr., 1860, Cypr., 484, — 1863, Atl. Ichth., IIT, 139; 
Gthr., 1866, Cat., VI, 310; Jor. & C., 1877, B. Buf. Soc., IIT, 142; Jor., 1878, B. U.S. Geol. Surv., IV, 
411, 432, — 1887, Rep. U. S. F. Com., 837; Jor. & G., 1882, B. 16 U. S. Mus., 343, 893, — 1883, P. 
U. S. Mus., V, 239, 256; Everm. & K., 1894, B. U.S. F. Com., 1892, pp. 75, 76, 83, 87, 89, 107. 
Lucania affinis Grd., 1859, P. Phil. Ac., 118; Blkr., 1860, Cypr., 484; Jor. & C., 1877, B. Buf. Soc., 
III, 142; Jor., 1878, B. U. S. Geol. Surv., IV, 432. 
Lucania parca Jor. & G., 1882, B. 16 U. S. Mus., 343, 893; Jor. 1885, P. U. S. Mus., VII, 109, — 
1887, Rep. U. 8. F. Com., 837; Bean, 1889, B. U. S. F. Com., VII, 129, 132, 148, pl. 2, fig. 18, — 1892, 
P. U. S. Mus., XIV, 92; Hensh., 1891, B. U. S. F. C., IX, 374; Smith, 1892, B. U.S, F. C., X, 68; 
Everm., 1893, B. U.S. F. Com., 1891, p. 87; Everm. & K., 1894, B. U. S. F. Com., 1892, pp. 83, 92, 
107, pl. 25, fig, 1. 
B. 6; D. 10-12; A. 10-11; V. 6; P. 14; Li. 27-30; Ltr.8; Vert. 
14+ 14. 
The arch on either back or belly is not very strong. As compared with 
species of Fundulus and Zygonectes the amount of compression over the body 
cavity and forward is quite marked. Depth about two sevenths of the length 
to the caudal; caudal region moderately deep. Head about one fourth of the 
total length, deeper than wide, flattened on the crown. Snout short, blunt, 
three fourths of the eye; chin steep. Mouth rather small, lower jaw longer, 
