Haplochilichthys and Nothobranchius differ from other Cyprinodontide 
in possessing pseudobranchs, and in the enlargement of the teeth in the 
inner row on the jaws; they are distinguished from one another by the 
structure of the jaws. 
No doubt several of the species of Haplochilus from Africa are yet to be 
placed in this genus. The characters necessary for a positive decision are 
not given in the descriptions, and in the absence of specimens they remain 
as placed by others. 
THE CYPRINODONTS. 157 
Haplochilichthys spilauchen. 
Pacilia spilauchena Dum., 1861, Arch. Mus., X, 258, pl. 22, fig. 6. 
Aplocheilichthys spilauchen Blk., 1862, Mem. Poiss. Guin., 117. 
Aplocheilichthys typus Bik., 1862, Mem. Poiss. Guin., 116, pl. 24, fig. 1, — 1863, Atl., III, 140. 
Epiplatys spilauchen Gill, 1863, P. Phil. Ac. (1862), 136. 
Haplochilus spilauchen Gth., 1866, Cat., VI, 312; Steind., 1870, Sb. Ak. Wien, LXI, ext. p. 26, — 1893, 
Notes Leyd. Mus., XVI, 75 ; Sauv., 1880, Nouv. Arch. Mus., III (2), 23, 31. 
Pecilia Bensoni Pet., 1864, Mb. Bri. Ak., 395. 
~ Pacilia sexfasciata Pet., 1864, Mb. Bri. Ak., 396. 
Haplochilus sexfasciatus Gth., 1866, Cat., VI, 313; Sauv., 1880, Nouv. Arch., IIT (2), 23. 
Lycocyprinus sexfasciatus Pet., 1868, Mb. Bri. Ak., 146. 
D. 7-8; A. 12-13; V.6; Ll. 24-27; Ltr. 8. 
Depth of average specimens about two sevenths of the length to the base 
of the caudal; head two sevenths to three tenths. Eye three sevenths to 
three eighths, forehead one half, and length of snout four elevenths to one 
third of the length of the head. Dorsal origin near half way from the head 
to the base of the caudal. Anal with several rays to half of its base in 
advance of the origin of the dorsal. 
Hinder half of the body with six or seven grayish violet narrow trans- 
verse bands, and as many on the caudal. Males with a little broader silvery 
band in front of each of those on the body, and the anal flecked with light 
and darker on its hindmost rays. On young the transverse bands are indis- 
tinct or absent. (Steindachner.) 
Jaws equal in length. Dorsal origin midway from eye to end of caudal, 
opposite the seventeenth scale of the lateral line and the middle of the anal. 
All the fins elongate in the male. Nearly uniform greenish olive, with 
a blackish spot behind the upper part of the humerus. Males have the tail 
ornamented with irregular silvery cross bars, and the vertical fins with fine 
blackish transverse lines. (Giinther.) Liberia; Gaboon. 
