NO. 2294. FISHES FROM WEST AFRICA— FOWLER. 285 



complete. Cheek with 2 or 3 rows of scales. Scales on breast 

 small, 25 to 27 before ventral origin to isthmus. Lateral line with 

 simple tubes. Spinous dorsal edge notched; sixth spine, 2-|- to 2f in 

 head. Soft doi*sal and anal end in long points behind or about two- 

 fifths in caudal; fifth dorsal ray, 1| to If in head; third anal spine*, 

 2| to 2-|; fourth anal ray, IJ to If. Caudal slightly emarginate 

 behind. Pectoral with upper median rays longest to middle of soft 

 anal base, 1 to If in head; ventral, 1^ to IJ. Ventral spine, half 

 or less than fin length; long pointed first ray nearly to soft 

 anal origin. Color in alcohol brownish, each scale with median 

 small round pale spot. Pectoral uniform; other fuis all more or 

 less with small round pale spots, mostly terminal on ventral. Operole 

 with slaty-black blotch little less than eye. Eleven examples, 109 

 to 203 mm. Quanza River at Cunga. 



TILAPIA HEUDELOTI A. Dumeril. 



Head 2f to SyV; depth, 2 to 2f ; D. XV or XVI, 10 to 14; A. Ill, 

 8 to 11; scales, 18 to 21 in upper section of lateral line, 9 to 15 in 

 horizontal section to caudal ba-se, and 2 or 3 more on latter; 2 or 3 

 scales above upper lateral line to soft dorsal origin and 6 to 8 below 

 lower lateral Ime to spinous anal origin; 8 to 11 predorsal scales; 

 snout, 24 to 3^ in head; eye, 3f to 4; maxillary, 3f to 4; mterorbital, 

 2| to 3^. Body elongately ellipsoid. Least depth of caudal pedun- 

 cle. If to 2| its width. Head width. If to 2J its length. Snout 

 long as wide; length about four-fifths its width in young. Eye 

 advanced; hind pupil edge about midway in head length in young; 

 with age, front pupil edge about midway. Mouth small, lower jaw 

 slightly included, sometimes slightly protrudes m young. Maxillary 

 little beyond nostril in young, lialfway beyond to eye with age. 

 Outer teeth about 32 and lower 30 in young, all well notched, and 

 2 or 3 inner inconspicuous rows of tridentate teeth, well separated 

 from outer rovvs. Adult teeth, 50 above and 25 below in outer row, 

 all well notched, and 4 inner irregular rows of less conspicuous tri- 

 dentate teeth in each jaw, well separated from outer row. Inter- 

 orbital convex. Rakers, 4 + 10, short, lanceolate, half of filaments, 

 or 1| in eye. Scales cycloid; basal striae, 11 to 14; circuli mostly 

 complete. Cheek with 2 or 3 rows of scales. Scales on breast 

 small, 24 to 26 before ventral origin to isthmus. Tubes in lateral 

 line simple, or occasional small irregular accessory branch. Spinous 

 dorsal edge notched; last spine, 1| to 2§ in head. Soft dorsal and 

 anal end in long points behind or about two-thirds in caudal, fifth 

 dorsal ray, 1 + 1| to 2 in head; third anal spine, 2 J to 2^; fifth anal 

 ray, 1+f to 2. Caudal slightly emargmate behind, 1+i to IJ in 

 head. Pectoral with upper median rays longest, not quite to vent 

 01 within an eye-diameter of anal to anal in 3^oung; 1 + i to If in 



