286 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



head; ventral, l+\ to 1^. Ventral spine, two-fifths of fin, which 

 reaches far back as pectoral tips extend. Color in alcohol olive- 

 brownish, generally largely uniform in adult; young with about 8 

 dark vertical bands. Blackish opercular blotch little less than eye- 

 diametei. Black blotch about size of pupil at soft dorsal origin, 

 larger and ocellate in j^oung, and with 4 or 5 dark oblique streaks 

 behind, much broader and fewer in 3"0ung. Several dark bars on last 

 anal rays in adult. Length, 49 to 225 mm. 



The above account from 8 examples from the Quanza River, 

 besides an adult from the St. Pauls River, in Liberia, and 26 examples 

 from the Beyah River, at Elmina, in Ashantee, all previously listed. 



TiLAPIA CABRAE Boulenger. 



Head, 2f ; depth, 2 to 2J; D. XV, 12 or 13; A. Ill, 9 or 10; scales, 

 21 or 22 in upper section of lateral line, 10 to 13 in horizontal section 

 to caudal base, and 2 to 4 more on latter; 2 or 3 scales above upper 

 lateral line to soft dorsal origin, and 7 or 8 below from horizontal 

 lateral line to spinous anal origin; 10 to 12 predorsal scales; snout, 

 2| to 3| in head; eye, 3f to 4; maxillary, 3^ to 3^; interorbital, 2f 

 to 2§. Body rather deeply ellipsoid, with predorsal usually somewhat 

 prominent. Head width about half its length. Snout length about 

 four-fifths to five-sixths its width. Eye advanced, or hind pupil 

 edge slightly before middle in head length in young, scarcely median 

 in larger examples. Mouth small; jaws about even. Maxillary 

 extends slightly beyond nostril in • young, or two-fifths m space 

 beyond to eye in larger examples. Teeth in sm^all examples, 36 in 

 upper outer row and 40 in lower outer row, all well notched, and 3 or 

 4 inner rows of smaller tridentate teeth in each jaw. Adult teeth 

 similar; outer in both jaws 50 and inner rows 7 or 8. Interorbital 

 convex. Rakers, 4 + 13 or 14, short, lanceolate, 3 in filaments or 

 If in eye. Scales cycloid, basal striae 14 to 16, circuli mostly com- 

 plete. Cheek with 3 or 4 rows of scales. Scales on breast small, 

 21 or 22 before ventral origin to isthmus. Lateral line with simple 

 tubes. Spinous dorsal edge notched, last spine If to If in head. 

 Soft dorsal and anal end in long points two-fifths to one-half in 

 caudal; fifth dorsal ray, 1| to U in head, third anal spine 2 to 2|, 

 fourth anal ray IJ to 1^. Caudal convex behind, 1^ in head. Pec- 

 toral variably to vent, occasionally to anal; 1^ to If in head; ven- 

 tral, 1 to 1 i^ij-. Ventral spine, 1§ to If of fin and reaches further than 

 pectoral, or at least to anal. Color in alcohol olive-brownish gener- 

 ally, largely uniform. Trunk with 5 or 6 inconspicuous dusky ver- 

 tical bands, obsolete with age. Blackish opercular blotch less than 

 eye. Dusky blotch at soft dorsal origin less than eye, less defined 

 with age. Last dorsal and caudal rays with small round pale spots 

 surrounded with deeper brownish. Five examples, 183 to 187 mm., 

 from the Quanza River at Cunga. 



