THE CYPRINODONTS. 157 



Haplochilicbthys and Nothobranchius differ from other Cyprinodontidoa 

 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 reniain 

 as placed by others. 



Haplochilichtliys spilauchen. 



Pcecilia spilaveiena Dum., 1861, Arch. Miis., X, 258, pi. 22, fig. 6. 

 Aplocheilichthys spilauchen Blk., 1862, Mem. Poiss. Guia., 117. 



A-ploeheilkhthys typus Blk., 1862, Mem. Poiss. Guin., 116, pi. 24, fig. 1,-1863, Atl, III, 140. 

 Epiplatys spilauchen Gill, 1863, P. Phil. Ac. (1S62), 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. Arcb. Mus., Ill (2), 23, 31. 

 Pxcilia Bensoni Pet., 1864, Mb. Brl. Ak., 395. 

 Fcecilia sexfasciata Pet., 1864, Mb. Brl. Ak., 396. 



Haplochilus serfasciatus Gth., 1866, Cat., VI, 313; Sauv., 1880, Nouv. Arch., Ill (2), 23. 

 Lycocyprinus sexfasciatus Pet., 1868, Mb. Brl. Ak., 146. 



D. 7-8 ; A. 12-13 ; V. 6 ; LI. 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. (Gunther.) Liberia; Gaboon. 



