40 Dr. E. Lénnberg on 
length of head. Filamentous prolongation of ventral 
reaching beyond anus, but not quite to origin of anal. 
Anal III 7-8; third anal spine shorter, but stouter, than 
last dorsal. Caudal rounded. Caudal peduncle deeper than 
long. Scales smooth, 25 in a longitudinal series; trans- 
verse series 32, 1. Upper lateral line 20, lower lat. line 5-10. 
On the smallest specimen, about 130 millim., four dusky 
transverse bars may be traced. All specimens have a black 
opercular spot near the upper end of the hind margin of the 
opercle. It seems as if the anal had been longitudinally 
banded with a distal and a basal darker band and a lighter 
(coloured ?) one between. 
Three adult specimens from the Meme River, far inland, 
the largest 140 millim. 
In three young specimens, measuring from 47 to 63 millim. 
in total length, the height of body equals the length of head, 
and both are contained 22 times in the length of head and body 
without caudal; but the eyes are, as usual in young fishes, 
comparatively larger, and are only contained 3 times in length 
of head, and the diameter of the eye is $ of the length of 
snout. 
In a seventh specimen, of intermediate size (80 millim.), 
the relative dimensions have approached those of the adult, 
the eye being contained 34 times in length of head and 
about 12 in length of snout. 
This species is no doubt most nearly related to Pelmato- 
chromis Batesit, Boulenger*, from the French Congo, but 
differs from that species in its relative dimensions, among 
other things in its longer head, longer snout, smaller eye, one 
spine more in the dorsal, shorter anal spines, fewer scales, 
and (no doubt) different coloration. 
In the following table some comparative measurements of 
different stages of development of this fish are given :— 
Total length without caudal fin.... 47mm. 63mm. 103mm, 110mm. 
Length of headin °/, of total length. 388°3 38:0 38'8 38:1 
Depthsotshody crs pe wae ee = 38°83 580 42°7 41:8 
Distance from snout to anal fin..., 69:1 71:4 72:8 71:8 
i “5 es ventral fin.. 40-4 4) 2 43°6 42-7 
Length of ventrals ..........000. 27°6 30:1 28°1 80:0 
ppt BPE CHOTAIS cietatac slely ol. min 51:9 28°5 28'1 29:0 
Depth of caudal peduncle ,....... 17-0 15:9 16:0 15:4 
Length of ,, te ee 14:8 11:9 111 11:3 
Diameter of eye in °/, of length of 
head aie ete hee Galerie ee 33'3 29'1 23°7 226 
Length of snout ...scecsereseees 41°6 43°8 525 50 
Interorbital breadth ,.:.....-..- Died 29:1 32'5 30:9 
—————— SO oS 
* Ann. & Mag. Nat. Hist. (7) vol, viii. (1901). 
