488 



CICHLID.fi. 



30. BAYONIA. 



Bouleng. Ann. Mus. GenoTa, (3) v. 1911, p. 70. 



Near IlemUilapia, but teeth much larger and fewer, in two series, 

 the outer with very large compressed crowns, with long anterior cusp 

 directed inwards and very short or indistinct posterior cusp, the inner 

 minute and conical. 



Victoria Nile. 



Pig. 338. 



Bayonia xenodonta. 

 Type (Ann. Mus. Genova, 1911). 



1. BAYONIA XENODONTA. 

 Bouleng. 1. c. pi. ii. fig. 1. 



Depth of body 2J times in total length, length of head 3 times. 

 Head twice as long as broad, upper profile descending in an even curve ; 

 snout rounded, as long as broad, as long as eye, which is 3^ times in 

 leno-th of head and equals interorbital width ; jaws equal in front ; 

 mouth extending to below anterior border of eye ; 24 teeth in outer 

 row of upper jaw ; inner teeth small and few ; three series of scales 

 on the cheek, the depth of the scaly part below the eye less than the 

 diameter of the latter. Gill-rakers short, 9 on lower part of anterior 

 arch. Dorsal XVI 9 ; spines increasing in length to the last, which 

 measures nearly ^ length of head ; longest soft rays a little more than 

 i length of head. Anal III 9 ; third spine longest, not quite ^ length 



