5. Ad. 



Secconda Lagoon, „ 



6-21, 22-41. Ad., 



Lagos Lagoon. 



hgr., & yg. 





42. Skel. 



51 



43-62. Yg. 



Lagos. 



63-64. Hgr. & yg. 



W. Africa. 



178 CICHLTDiE. 



often black ; dorsal sometimes edged with black ; the angles of the 

 caudal sometimes black ; young with rather indistinct dark bars on 

 the side. 



Total length 165 millim. 



Gold Coast, Ashantee, Lagos. — Types in Leyden Museum. 



1-4. Ad. Ancobra It., Gold Coast. Major Burton and 



Capt. Cameron (P.). 

 W. P. Lowe, Esq. (C). 

 Major G. E. Brace (P.). 



?> 



Mr. E. Reichelt (P.). 

 This and the preceding species may ultimately have to be regarded as 

 varieties of T. heudeloti. I am unable to find characters by which to 

 separate them sharply. 



18. TILAPIA NGOMENSIS. 

 Pollegr. Bull. Soc. Zool. France, xxxviii. 1913, p. 274. 



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

 Snout nearly as long as eye, which is 3§ times in length of head and 

 lj times in interorbital width ; mouth extending to below anterior 

 border of eye; teeth in 5 series, 60 in outer series of upper jaw; 4 

 series of scales on the cheek. 16 gill-rakers on lower part of anterior 

 arch. Dorsal XVI 13 ; spines subequal from the seventh. Anal 

 III 10. Pectoral a little longer than head, reaching vertical of origin 

 of anal. Ventral reaching anal. Caudal rounded. Caudal peduncle 



3- . ^4 



deeper than long. Scales cycloid, 33 j§; lateral lines 7^. Yellowish, 

 with 7 broad brown bars on the sides and a large black spot at the 

 base of the first soft rays of the dorsal ; fins purplish. 



Total length 190 millim. 



Ngomo, Ogowe. — Type in Paris Museum. 



19. TILAPIA HAUGI. 

 Pellegr. Bull. Soc. Philom. (10) iii. 1911, p. 274, fig. 



Depth of body 2 to 24 times in total length, length of head 3 times 

 or slightly over 3 times. Head nearly twice as long as broad ; snout 

 rounded, with straight upper profile, a little longer than broad, 

 as long as or a little shorter than postocular part of head ; eye 0-3- to 4 

 times in length of head, If to If times in interobital width, a little less 



