124 THE CYPRINODONTS. : 
lower surface of head silvery, top of head darker, with or without a blackish 
line along the middle of the flank and transverse cloudings on the fins. 
Small scattered spots of brownish are usually present along the middle of 
the flank, in cases arranged in a longitudinal series in a darkish band from 
the opercle to the base of the caudal. Under a powerful lens, body, head, 
and to some extent the fins are seen to be puncticulated with darker. 
Alabama to Texas. 
HAPLOCHILUS. 
Aplochilus McClell., 1839, As. Res., XIX, 301, 426; Blkr., 1863, Cypr., 483, 490, — 1863, Atl., III, 
141. Apocheilini Blkr., 1860, Cypr., 483. Aplocheiliformes Blkr., 1863, Atl., III, 140. 
Panchax Val., 1846, C. V. Poiss., XVIII, 580; Cant., 1849, J. As. Soc., 1234; Blkr., 1852, Verh. 
Bat. Gen., XXIV, extr. p. 22, — 1860, Cypr., 483, 488, — 1868, Atl., ITI, 141. 
Haplochilus Gthy., 1866, Cat., VI, 310; Day, 1873, Fish. Ind. & Burm., 276,—1878, Fish. Ind., 
T, 521. 
Body depressed forward, compressed behind the middle; caudal pedicel 
deep. Head elongate, shovel-shaped in front, flattened on the crown. Snout 
broad, produced. Both jaws much depressed, with firm symphyses, upper 
jaws protractile. Teeth subconical, hooked, m bands. Body cavity less 
than half the total length; intestine short. Dorsal fin short, base ex- 
tending farther back than that of anal. Anal longer than dorsal, farther 
forward. Japan, Asia, Africa, and Central America. 
One American species has been described, from Costa Rica. 
By snout, mouth, fins, and general features the species placed in this 
genus appear to be sufficiently distinguished from those of Zygonectes. 
To unite these genera, with the characters possessed, would necessitate 
placing both in Fundulus. 
Haplochilus panchax. 
Plate III. Fig. 7, teeth. 
Esox panchax Ham. Buch., 1822, Gang. Fish, 211, 380, pl. 3, fig. 69. 
Aplocheilus panchax McCl., 1839, As. Res., XIX, 302. 
Aplocheilus chrysostigmus McCl., 1839, As. Res., XIX, 301, 426, pl. 42, fig. 2; Blk., 1860, Cypr., 487. 
Panchax Buchanani Val., 1846, C. V. Poiss., XVIII, 883; Blk., 1853, Ichth. Beng., 72, 144, —1855, 
Nat. Tyd. Ned. Ind., IX, 392, 398, —1857, A. S.S. I. N., III, 27,1859, En. Sp. Pisce. Ind., 155, — 
1860, A. S. S. I. N., VIII, 25, 54, —Cypr., 487, 488, — 1863, Atl., III, 141, pl. 144 (Cypr. 43), fig. 3; 
Blyth, 1858, J. As. Soc. Beng., 288 ; Mart., 1876, Preuss. Exp. Zool., I, 209. 
Panchax Kuhlii Val., 1846, C. VY. Poiss., XVIII, 384. 
Panchax Panchax Cant., 1849, J. As. Soc., 1284, Cat., 252. 
Panchax melanotopterus Blk., 1850, Verh. Bat. Gen., XXII, ext. p. 22, — 1852, XXIV, ext. p. 22, — 
1853, Ichth. Beng., 145, — 1860, Cypr., 487. 
