Hemichromis biniaculatus.
Hemichromis bimaculatus, Gill. Proc. Philad, Ac. 1862, p. 137 ; Steind.
Notes Leyd. Mus. xvi. p. 49.
Hemichromis auritus, Gill, I. c. p. 135.
Allied to H. guttatus and H. subocellatus, but with the body
deeper and the spinous dorsal higher.
D. A. ■§. L. lat. 24. L. transv. 3/10.
The height of the body is contained 2\ in the total length
(without caudal), the length of the head 2J. Length of the
snout equal to the diameter of the eye, which is one fourth of
the length of the head and equal to the width of the interorbital
space. Teeth conical, brown, equal in size. Four series of
scales on the cheek. Cleft of the mouth rather narrow,
slightly oblique, with the lower jaw slightly projecting and
with the maxillary not quite reaching the vertical from the
front margin of the orbit. The length of the eighth dorsal
spine is two fifths of that of the head. In the adult the soft
dorsal and anal and the ventral fin are produced into points.
Brownish above, a deep black spot on the end of the operculum
and another in the middle of the body; three or four
series of round bluish spots on the cheek and gill-cover. Fins
without spots.
millim.
Total length . . ........................ 78
„ „ without caudal . . . . . . . 60
Depth of the b o d y ...................................................25
Length of the h e a d ............................................. 22
Diameter of the e y e ......................................... 6
From the middle course of the Ogowe River.
Hemichromis Schwebiscki.
? Hemichromis Schwebischi, Sauvage, Bull. Soc. Zool. France, ix. 1884,
p. 198, pi. v. fig. 2.
D. i2p7-6. A. f. L. lat. 28. L. transv. 3/10.
The height of the body is contained 2 l times in the total
length (without caudal), the length of the head 2\ times.
Snout produced, with the upper jaw slightly the longer,
longer than the postorbital portion of the head. Mouth of
moderate width, very slightly oblique, the maxillary reaching
but little beyond the vertical from the nostril. Teeth small,
subequal, with brown pointed tips. The eye is a little less
than one-half of the length of the snout and contained
4| times in that of the head ; its diameter does not equal
the width of the interorbital space in the largest specimen.
Praeorbital as wide as the eye. Praeoperculum with a broad
scaleless inferior limb, but its width is much narrower than
the cheek, on which the scales are arranged in four series.
The dorsal fin commences above the root of the pectoral fin \
its spines are of moderate strength, the middle ones being
much longer than the eye. Caudal fin slightly emarginate.
Specimens from Azumin^ Creek have sixteen dorsal spines
and the pectoral fin reaches nearly the vent. Two faint broad
longitudinal bands on the upper half of the body are crossed
by five or six transverse bands, equally faint, the parts
crossed being of a darker tint. These markings are more
distinct in young examples than in the adult. An opercular
spot. c
Specimens from Kondo-Kondo have fifteen dorsal spines
and a rather shorter pectoral. None of the markings are
present beside the opercular spot.
Total length . j. .S.. u / A... ........................................m.. Ii4lligm.
» „ without caudal . . . I2c
Length of the h e a d ......................... ’ ' ' .2
Diameter of the eye . . . . . . . ’
Length of the ninth dorsal s p in e .................... j 5
The specimen described by Sauvage was considerably larger
than ours ; to this circumstance I am inclined to ascribe the
discrepancies between the two descriptions.
Cynoglossus senegalensis, Kaup.
Lambarene.
Clanas Walkeri, sp. n.
D. 77. A. 56. P. 1/8.
Vomerine teeth villiform, forming a rather narrow band
without Posterior projection, and as broad as the intermaxillary
hnth th^ f „ k tt f r 1S twice as wide as broad, and
both the intermaxillary and vomerine bands have the same
lateral extent. Head covered above with smooth thin skin
scarcely any granulation being visible. The occipital process
projects as an isosceles triangle, the hind margin of the head
forming an open crescent on each side of the process. The