r 68 
TILE TANGANYIKA PROBLEM. 
and reaches the first soft ray of the dorsal. Anal III. 7. Caudal deeply bifurcate. 
Skin smooth. Pale reddish brown above, with very numerous blackish brown round 
spots, which are smaller on head and nape ; lower parts and barbels white 
unspotted ; ventrals yellow ; dorsal and caudal broadly edged with yellow. 
Total length, 240 millim. 
Described from a single specimen from Sumbu. 
23. Malapterurus electricus. Lacep. 1801. 
Kalambo. 
CYPRINODONTI 1 ).-K. 
24. Haplochilus tanganicanus.— Blgr. 1900. (Fig., p. 181, lower.) 
Body compressed, its depth 4 times in total length ; length of head, 4} times. 
Snout depressed ; lower jaw projecting beyond the upper ; eye a little longer than 
snout, a little shorter than interorbital width, 3 times in length of head. Dorsal 13, 
originating at equal distance from the head and the caudal fin ; the first ray corre- 
sponds to the 18th scale of the lateral line ; posterior rays longest, § length of head. 
Anal 28, originating below extremity of pectoral. Pectoral $ length of head, 
extending far beyond root of ventral. Caudal feebly emarginate. Caudal peduncle 
twice as long as deep. Scales 42 in a longitudinal line, 11 in a transverse line, 
silvery, with a darker lateral stripe ; dorsal and anal with greyish horizontal streaks. 
Total length, 80 millim. 
Described from a single specimen from Mbity Rocks. 
SERRANID2E. 
25. Rates microlepis. — Blgr. 1898. (Fig., p. 171.) 
Originally described from young specimens, 155 millim. long. The adult, 
measuring 800 millim., and weighing 14 lbs., has, as could be expected, very different 
proportions, and is of a uniform dark silvery colour. The eye is contained 9 times 
in the length of the head, which is J of the total ; longest dorsal spine, 4 length of 
head. Caudal peduncle and caudal fin as in the young. 
Native name, “ Sangala. ” 
CICHLIM). 
26. Lamprologus tetracanthus. — Blgr. 1899. 
27. Lamprologus elongatus. — Blgr 1898. (Fig., p. 213, upper.) 
Six to 8 large canine teeth in front of each jaw, followed by a broad band of 
minute villiform teeth ; lateral teeth very small. Depth of body 4 times in total 
length ; length of head 2 } to 2 \. Snout twice as long as diameter of eye, which 
