the Fumily Cichlide. 47 
Vertebree 34 (17+17); third with vestigial inferior apo- 
physes ; pracaudals with parapophyses from fourth, last 
four pairs bridged; ribs, except first, in sockets at or near 
ends of parapophyses. 
Tanganyika ; a single species. 
22. AULONOCRANUS, gen. nov. 
(type Paratilapia dewindii, Bouleng.). 
Dorsal XII-XIII 12-13. Anal III 9. Scales denticu- 
late, large (36-38); two lateral lines. Mouth terminal, 
moderately protractile ; maxillary moderately broad, exposed 
distally ; teeth very small, conical, in 2 or 3 series, outer- 
most largest. Lower pharyngeal triangular; teeth small. 
Occipital crest ending on posterior part of interorbital region. 
Frontals, nasals, preorbitals, lower jaw, and lower limb of 
preoperculum with large channels with wide openings; sub- 
orbitals narrow. 
Tanganyika; a single species. 
Intermediate between Haplochromis and Trematocara. 
23. TremavocaRA, Bouleng., 1899 (type T. marginatum, 
Bouleng.). : 
Dorsal IX—XII 9-12. Anal III 7-10. Scales cycloid, 
large (28-32) ; upper lateral line short, lower absent. Near 
Aulonocranus, but maxillary concealed, and the deep channel- 
ing of the bones of the head extending to the suborbitals. 
Occipital and parietal crests not extending forwards on 
frontals ; ethmoid united with vomer by suture; a large otic 
bulla; articular surface for upper pharyngeals formed by 
parasphenoid in the middle and basioccipital at the sides. 
Vertebre 31 (12+19) ; third without inferior apophyses ; 
precaudals with parapophyses from the fourth ; ribs, except 
the first, on parapophyses. 
Tanganyika; three species. 
24, StappersiA, Bouleng., 1914 
(type S. singularis, Bouleng.). 
Dorsal XIJI-XV 13-14. Anal III 13-14. Innermost 
rays of pelvic fins longest. Scales denticulate, large (37- 
38) ; two lateral lines. Apparently differs from Hnantiopus 
only in the dentition; teeth small, conical, in 4 or 5 series, 
outer not directed outwards. 
Tanganyika ; a single species. 
