160 MR. C. TATE REGAN ON THE 



From what 1ms been said above as to the evolution and 

 I'elatiou ships of the Cichlidre of Victoria, it will be evident that 

 I do not regard the classification here proposed as entirely 

 satisfactory. A number of divergent species are placed in 

 Haplochromis and a few extreme types are regarded as generically 

 distinct, although the close relationship of each to a species of 

 Haiylochromis is obvious. At present I am not in a position to 

 improve this arrangement. 



Synopsis of the Genera. 



I. Scales c.ycloid 1. Tilapia. 



II. Scales ctenoid. 



A. Teetli in 2 or more series anteriorly ; a single series on each side of upper 



jaw. 



Sanal spines 2. Saflochromis. 



4 to 6 anal spines 3. Astatoreochromis. 



B. Several series of teeth on each side of upper jaw. 



1. Tipper jaw with an outer series of enlarged teeth and several inner sei-ies 

 of small teeth anteriorly, and 3 or 4 series of enlarged teeth laterallj'. 



4. Macropleurodus. 



2. Teeth small, conical, in bands. 



Bands rather broad, narrower at the sides than in front 5. Hoplotilapia. 



Bands very broad, upper broader at the sides than in front... 6. Flatytaniodus. 



1. TiLAPiA A. Smith, 1840. 



Pharyngeal apophysis formed by parasphenoid only. Scales 

 cycloid. An outer series of bicuspid teeth and several inner 

 series of tricuspid teeth. 



Africa and Syria, 



1. TiLAPiA VARIABILIS Bouleng., 1906. 



Tilapia variahilis Bouleng. Cat. Afr. Fish. iii. p. 167, fig. 108. 



Teeth in 4 to 8 series, 50 to 120 in outer series of upjDer jaw. 

 17 to 19 gill-rakers on lower part of anterior arch. Dorsal 

 XYI-XVill 10-13. . Anal III {IV) 10-11. Pectoral longer 

 than head. 



Total length 320 mm. 



L. Victoria and Victoria Nile. 



2. Tilapia zillii Gerv., 1848. 



Tilapia zillii Bouleng. Cat. Afr. Fish. iii. p. 197, fig. 126. 



Teeth in 3 to 6 series, 20 to 60 in outer series of upper jaw. 

 8 to 11 gill-rakers on lower part of anterior arch. Dorsal XIV- 

 XVI 10-13. Anal III 7-10. Pectoral usually not longer than 

 head. 



Total length 290 mm. 



Syria to the Niger and the Victoria Nile. 



2. Haplochromis Hilgendorf, 1888, 



Pharyngeal apophysis formed by parasphenoid in middle and 

 bnsioccipital at sides. Scales ctenoid. Teeth in 2 or more series 



