the Family Cichlide. 37 
C. Seales large ; 3 anal spines; teeth strong, compressed. 
Teeth bi- or triserial, distally expanded and 
druncate” . .....< 4. desi eebtawelet nets 5.4 33. Eretmodus. 
Teeth uniserial, distally slightly expanded and 
EUUUUCD .. 5.0 i; eee ee aE ee wiaGn Se & 34, Spathodus. 
D. Scales large or small; 4 to 10 anal spines; a band of small 
teeth and an outer series of conical teeth, the anterior strong. 
1. Inner teeth tricuspid ........+.000+ 35, Telmatochromis, 
2. Inner teeth conical; suborbitals ligamentous. 
36, Julidochromis. 
8. Inner teeth conical; suborbitals ossified. 
37. Lamprologus, 
1. TYLOCHROMIS, gen. nov. 
(type Pelmatochromis jentinki, Steind.). 
Dorsal XITI-XVI 12-17. Anal III 7-9. Scales eycloid 
or finely denticulate, large or rather small (30-60) ; two 
lateral lines, the lower extending far forward. Mouth 
terminal ; teeth conical, in 2 to 5 series. Lower pharyngeal 
triangular, with slender pointed teeth at least near the 
posterior angles and large rounded flat teeth in the middle 
at least posteriorly. Posterior part of parasphenoid with a 
strong apophysis ending in a flattish triangular or broadly 
ovate surface for articulation of upper pharyngeal. Vertebree 
29-32 (15-16 + 14-16) ; third with inferior apophyses uniting 
to form a strong median spine. 
Tanganyika; Congo ; Gambia to Liberia. 
The Tanganyika species (7. polylepis) differs from its 
congeners in the smaller scales (55 to 60 instead of 30 
to 45). 
2. TivapiA, A. Smith, 1840 (type 7. sparrmanni, A. Smith). 
Dorsal XI-XVIII 9-16. Anal III-IV (V-VI) 7-12. 
Scales cycloid or feebly denticulate, large (26-36) ; two 
lateral lines. Mouth terminal; maxillary concealed or 
slightly exposed distally ; teeth in jaws in several series, the 
outermost typically bicuspid (some often uni- or tricuspid), 
rarely all conical; inner series typically tricuspid, some 
occasionally unicuspid in adults. Lower pharyngeal tri- 
angular or heart-shaped, with slender or moderately stout 
uni-, bi-, or tricuspid teeth. Occipital crest extending 
forward to posterior end of a median excavation of anterior 
part of frontals; parietal crests extending forwards at least 
to between the orbits; nasal bones strongly expanded 
posteriorly ; premaxillary processes stout, much expanded 
