1899.] SYBIAX FISHES OF THE FAMILY CICHLID.*;. Ho 



to 1^ in inteforbital width ; mouth narrow, 5 to |- width of head, 

 extending to between nostril and eye ; 2 series of scales on the 

 cheek, forming a narrow obhque band ; large scales on the 

 opercle. Gill-rakers short, 15 to 19 on lower part of anterior 

 arch. Dorsal XV-XVI 11-13; last spine longest, | or a little 

 less than i length of head, f to | longest soft rays. Pectoral 

 falciform, 1| to Ig length of head, extending to origin of anal or 

 beyond. Ventral reaching vent or anal. Anal III 9-11 ; third 

 spine shorter than last dorsal. Caudal truncate, slightly emar- 

 ginate. Caudal peduncle deeper than long. Scales cycloid, 

 28-30 ^^ ; lat. 1. j|^. Olive above, golden beneath, uniform or 

 with 5 or 6 very indistinct, narrow, dark bars ; soft dorsal with 

 dark and light spots forming oblique streaks ; a dark opercular 

 spot. 



Total length 175 milHm. 



Gold Coast. 



10. TiLAPIA MACROCEPHALA. 



SarotJierodon melanotheron (nom. nud.), Eiipp. Yerz. Mas. Senck. 

 iv. p. 21 (1852) ; Glinth. Cat. iv. p. 273 (18t52). 



CTiromis macrocephalus (Bleek.), Glinth. 1. c. 



Melanogenes macrocepludus, Bleek. Nat. Verb. Vet. Haarlem, 

 xviii. 1863, no. 2, p. 36, pi. vi. fig. 2. 



Teeth very small, closely set, in 4 to 6 series in both jaws. 

 Depth of body 2| to 24 times in total lerigth, length of head 2|- 

 to 2| times. Snout with straight or convex upper profile, Ij to 

 1^ diameter of eye, which is 4 to 4| times in length of head and 

 1^ to 1 1 in interorbital width ; mouth moderate, about f w^dth of 

 head, extending to between nostril and eye ; 2 series of scales on 

 the cheek ; large scales on the opercle. Gill-rakers short, 15 to 

 17 on lower part of anterior arch. Dorsal XV-XVI 10-12; last 

 spine longest, i length of head, | longest soft rays, which are 

 somewhat produced. Pectoral falciform, IJ- to 1\ length of head, 

 extending to origin of anal or beyond. Ventral reaching origin of 

 anal. Anal III 7-9 ; third spine a little shorter than last dorsal. 

 Caudal truncate, slightly emarginate. Caudal peduncle deeper 

 than long. Scales cycloid, 28-30^^; lat. 1. j^^. Olive-brown 

 above, golden beneath ; indistinct light spots on the soft dorsal and 

 caudal fins, forming oblique streaks on the former ; a black oper- 

 cular spot ; chin and gular region black, or marbled with black. 



Total length 145 millim. 



Gold Coast. 



11. TiLAPIA NIGEIPINIS'IS. 



Tllapia nigripinnis (Guichen.), A. Dum. Arch. Mus. x. 1859, 

 p. 254, pi. xxii. fig. 2. 



Chromis nigrijnnnis, Giinth. Cat. iv. p. 270 (1862). 



Teeth very small, in 4 or 5 closely-set series in both jaws. 



8* 



