1 7 2 
THE TANGANYIKA PROBLEM. 
increasing in length to the last, which slightly exceeds longest dorsals. Caudal 
rounded. Caudal peduncle a little longer than deep. Scales 48 ^ ; lat. 1. 
I’ale brown, most of the scales dark-edged ; a blackish obliqe bar from 
below the anterior third of the eye to the maxillary ; a large blackish opercular 
spot ; three oblique blackish bands, descending forwards, on each side of the 
back, extending on the base of the dorsal ; dorsal and anal tipped with blackish. 
Total length, 107 millim. 
Described from a single specimen. 
This species takes its place in the series between L. tnoorii and L. congoensis. 
31. Lamprologus hecqui. — B lgr. 1899. 
32. Lamprologus moorii. — Blgr. 1898. (Fig., p. 203, upper.) 
Nine or 10 equal, moderately large conical teeth in front of each jaw, followed 
by a narrow band of minute teeth ; lateral teeth very small. Depth of body 2 h times 
in total length, length of head 3 to 3!. Snout as long as diameter of eye, which is 
3 to 33 times in length of head and equals interorbital width ; maxillary extending 
to below anterior border of eye ; cheeks with small, deciduous scales ; opercles and 
occiput scaled. Gill-rakers short, 9 or 10 on lower part of anterior arch. Dorsal 
XIX. -XX. 8-9; spines slightly increasing in length to the last, which measures 
nearly half length of head ; middle soft rays prolonged at least f length of 
head. Pectoral J to J length of head. Ventral prolonged into a long fila- 
ment. Anal VII. -VIII. 6-7 ; spines increasing in length to the last, which 
is a little longer than the longest dorsal ; middle soft rays prolonged into 
filaments. Caudal rounded. Caudal peduncle as long as deep. Scales 33-35 
5 — 7 24 — 28. 
; lat. I Dark brown ; fins blackish. 
11— 12 9—13 
Total length, 93 millim. 
Described from several specimens from Mbity Rocks and Kinyamkolo. 
33. Lamprologus brevis.— -Blgr. 1899. 
34. Lamprologus compressiceps. — Blgr. 1899. (Fig., p. 205, upper.) 
A few moderately large curved canine teeth in front of each jaw, followed by 
a narrow band of minute teeth ; lateral teeth very small, curved. Depth of body 
2j to 2| times in total length, length of head 2l to 2J. Head very strongly 
compressed, with concave upper profile ; snout a little longer than diameter of eye, 
which is 4 times in length of head and equals ii interorbital width ; maxillary 
extending to below anterior border of eye ; cheeks naked, opercles and occiput with 
small scales. Gill-rakers moderately long, 15 on lower part of anterior arch. 
Dorsal XX. -XXI. 6 ; spines increasing in length to the sixth, which measures half 
length of head, the posterior a little shorter ; longest soft rays a little longer than 
longest spines. Pectoral J to J length of head. Ventral prolonged into a 
