166 Mr. C. T. Regan on the African 
Olive ; scales with dark edges; dark longitudinal stripes 
between the series of scales; a dark bar above the oper- 
culum; sides of head with a dark network (adult); fins 
greyish ; dorsal sometimes with pale and dark spots. 
Fig. 2. 
A. Lower pharyngeal of Tylochromis lateralis (X 2) from a specimen 
220 mm. long, 
B. Ditto of Tylochromis jentinki (x 2) from a specimen 270 mm. long. 
C. Ditto of T'ylochromis labrodon (x 2) from a specimen 140 mm. long. 
D. Ditto of Tylochromis bangwelensis (X 2) from a specimen 240 mm. 
long. 
E. Ditto of Tylochromis polylepis (x 2) from a specimen 220 mm. long. 
Jongo. 
Four specimens, 155 to 260 mm. in total length, from 
Lakes Tumba and Leopold II. 
