a small specimen from the Nile, L. bibie has remained undiscovered in that river up to the present time. De Joannis. docs not mention the bluish cross-bars, which, however, are very faint. It is most desirable that specimens from the Nile should be directly compared with West African ones.
I am unable to arrive at a definite conclusion as to whether Barilus senegalensis, Steindachner (SB. Wien. Akad. 1870, lxi. p. 564, Taf. v. fig. 2), from the Senegal, should be referred to this species. Lat. 1. 59-63; maxillary extending to behind the centre of the eye.
I am equally uncertain with regard to Opsaridium Bucholzi, Peters (MB. Berl. Akad. 1876, p. 251, fig. 4). It also comes from the Ogowé River; but, to judge from the diagnosis and figure, Peters's fish has fewer scales in the lateral line (46), a smaller eye and longer snout (the specimens are of about the same size), and a longer maxillary, which reaches behind the middle of the eye. Peters represents his fish without any colour-markings.
Assuming that there are two distinct species of Barilius in West Africa, from a geographical point of view B. senegalensis would probably prove to be identical with the Nile fish, whilst the Ogowé specimens described by Peters and myself might prove to be the second species; but this assumption is not confirmed by the description of the various authors. Thus, as not one of the descriptions extant fully agrees with our specimen, I apply at present the oldest name to it.
Alestes macrophthalmus.
- Alestes macrophthalmus, Günth, Ann. & Mag. Nat. Hist. 1867, xx. p. 112.
Talagouga.
Alestes macrolepidotus, C. V.
Old Calabar.
Alestes lenciscus.
- Alestes leuciscus, Günth. Ann. & Mag, Nat. Hist. 1867, xx. p 113.
Egwanga, on the Opobo River.
Alestes longipinnis.
- Brachyalestes longipinnis, Günth, Fish. v. p. 315.
Azuminé Creek and Ogowé River.
