3. A . chloroechis, Schleg., = A. polylepis, Ptrs. With
31-36 series of scales and with a double row of
suboculars.
4. A. ceratophora, Werner.
Rana crassipes, Buchh. & Ptrs.
One young specimen from Glass, Gaboon estuary.
This specimen, as well as an adult in the British Museum,
has no vomerine teeth, whilst two short groups are present in
the second of the British Museum specimens, which is intermediate
in size between the two former.
F r e s h w a t e r F i s h e s .
Gobius ceneofuscus.
Gobius ceneofuscus^ Peters, MB. Berl. Akad. 1852, p. 681, and Reise n.
Mossamb., Flussf. p. 18, Taf. iii. fig. 1 ; Giinth. Fish. iii. p. 61.
Gobius ceneofuscus, var. guineensis, Peters, MB. Berlin. Akad. 1876,
p. 248.
Gobius taiasica, Steind. Not. Leyd. Mus. xvi. p. 25 (not synom.).
A Goby which seems to be very common in the freshwaters
of Liberia and the Cameroon River, and is abundant in the
Ogowe River, where numerous examples were obtained by
Miss Kingsley at Kondo-Kondo, is identical with the species
discovered by Peters in the Zambeze, but not, as Dr. Stein-
dachner thinks, with the West-Indian G. bttfuiiHZ, which has
considerably smaller scales on the tail. G. ceneofuscus, therefore,
belongs to the freshwater fauna of Tropical Africa ex,
tending right across the continent.
Gobius lateristriga, A. Dum. Arch. Mus. x. p. 247, pi. xxi.
fig 1, if not identical with this species, is, at any rate, closely
allied to i t ; unfortunately the author has omitted to describe
the scales, dentition, and other important characters.
Periophthalmus Koelreuteri, var. papilio, Bl. Schn.
Common on the Whst Coast, and attracting the notice of
every traveller by its semiterrestrial habits and by the
astonishing rapidity with which it leaps, frog-like, over the
mud-flats of the littoral.
Island of Corisco (Steindachner, SB. Wien. Akad. 1869, Ix.
P- 945)-
Eleotris senegalensis.
Eleotris (Culius) senegalensis, Steind. SB. Wien. Akad. 1869, Ix. p. 949,
Taf. ii. figs. 1, 2.
Ascends the Ogowe River, specimens having been obtained
at Kondo-Kondo.
Mastacembelus cryptacanthus.
Mastacembelus cryptacanthus, Giinth. P. Z. S. 1867, p. 102 ; Ann. &
Mag. Nat. Hist. 1867, xx. p. 110.
Mastacembelus Marchei, Sauv. Bull. Soc. Philom. 1876, p. 94; and N.
Arch. Mus. iii. 1880, p. 36, pi. i. fig. 1 ; Steind. Not. Leyd. Mus.
xvi. p. 31 Denkschr. Wien. Ak. 1879, xli., “ Ueber einige neue . . .
Fisch.,” p. 16.
Lambarene.
Mugil falcipinnis, C. V.
Warri (Niger delta).
Ophiocephalus obscurus, Gthr.
Lambarene and Kondo-Kondo.
Figured in Petherick’s ‘‘ Travels,” 1869, ii. pi. ii. fig. B.
C t e n o p o m a , Ptrs.
From an examination of a much greater number of specimens
than were at my disposal some years ago I have come
to the conclusion that the variation in the characters of the
species is of a limited extent, and that a greater number -of
species exist than I was formerly inclined to admit. Neither
is the distinction of this genus from Spirobranchus so sharp
as was supposed, the armature of the opercles not being
equally developed in all species, and very young Ctenopomas
apparently lacking it. A t present I divide the specimens
before me under the following specific names :—
I. A very distinct space between anal and caudal
fins.
A. Large scales on the back, above the lateral
line.
1. Maxillary extending below the centre
of the eye.
D. — - - . A. Subopercular armature
strong .................................................1. multispine, Ptrs.