TILAPIA. 



223 



praeorbital depth; mouth § to | width of head, extending to below 

 anterior border of eye ; teeth in 3 to 5 series, outer larger, 40 to 60 in 

 upper jaw ; lateral teeth conical but passing generally into the bicuspid 

 teeth ; 3 or 4 series of scales on the cheek, width of scaly part equal to 

 diameter of eye. Gill-rakers short, 8 to 10 on lower part of anterior 

 nrch. Dorsal XIV-XVI 8-10; last spine longest, | to ^ length of 

 head, | to f longest soft rays. Anal III 7-8 ; third spine as long as or 

 a little shorter than longest dorsal. Pectoral f to f length of head, 



Tier. 145. 



Tilapia callijjtera. 

 Type, after Giinther (P. Z. S. 1893). ?. 



not extending to vertical of origin of anal. Ventral reaching "vent or 

 origin of anal. Caudal rounded. Caudal peduncle as long as deep. 

 Scales finely denticulate, 30-33 nip; lateral lines j~^ Brown or 

 olive, with more or less distinct (h\rk and light. spots on the soft dorsal 

 and caudal fins ; a more or less distinct dark band from below the eye 

 to the angle of the mouth, sometimes extending to the chin ; a dark 

 opercular spot ; anal fin often with a few large round white spots ; 

 ventrals black in males. 



Total hmgth 140 millim. 



Lake Nyassa and Zambesi System. 



1. Type. L. Nyui^isa. 



2-4. Types. L. Nyasr^a and U})per Shire. 



Mr. J. A. AVilliams (().). 

 Sir H. H. Johnston (P.). 



0. Skel. 



G-14. Types of 

 C. s}(hocularL'!. 

 15-10. Yg. 

 17. Hgr. 



1J5. Typo. 



Between Kondowe and Karongi. A. Whyte, Esq. ((!.) ; 



Sir H. H. Johnston (P.). 

 Zoniba. 



