116 MB. G. A. BOtlLENGER ON THE AFRICAN AND [Eeb. 7, 



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

 with slightly concave upper profile, 1| diameter of eye, which is 

 Sg in leugth of head and I5 in interorbital width ; mouth small, 

 |- width of head, maxillary extending little beyond vertical of 

 nostril ; 2 series of scales on the cheek, forming a narrow oblique 

 band ; large scales on the opercle. Grill-rakers short, 16 on lower 

 part of anterior arch. Dorsal XVI 10; spines nearly equal in 

 length from the 6th, which measures f length of head and | 

 longest soft rays. Pectoral pointed, a little longer than the head, 

 extending to origin of anal. Ventral reaching vent. Anal III 8-9. 

 Caudal truncate, slightly emarginate. Caudal peduncle a little 

 deeper than long. Scales cycloid, 29 -Jy ; lat. 1. j^^^. Brown ; 

 indistinct darker oblique streaks on the soft dorsal. 



Total length 115 millim. 



Graboou. 



12. TiLAPIA DTJMERILI. 



CJiromis dumenlii, Steind. Verb, zool.-bot. G-es. Wien, xiv. 1864, 

 p. 225, pi. vii. fig. 1. 



Teeth small, in 4 series in both jaws. Depth of body equal to 

 length of head, 2| to 2f in total length. Snout with straight 

 upper profile, nearly 1| diameter of eye, which is about 4| in length 

 of head ; mouth rather large ; maxillary extending to below anterior 

 border of eye ; 2 series of scales on the cheek. Dorsal XV 10 ; 

 last spine longest, nearly | length of head, |- longest soft rays. 

 Pectoral pointed, a little longer than the head, extending beyond 

 origin of anal. Ventral reaching origin of anal. Anal III 9. 

 Caudal truncate, scaly in the basal half. Caudal peduncle a little 

 deeper than long. Scales cycloid, 30-31 '-^ ; lat. 1. j^. Brown, 

 each scale darker at the base ; a very narrow blackish opercular 

 spot. 



Total length 133 millim. 



West Africa. 



Apparently nearly allied to T. macrocephala, but distinguished 

 by a larger mouth. 



13. TiLAPIA LEPIDURA, Sp. U. 



Teeth very minute, in 4 closely-set series in both jaws. Depth 

 of body 2|- to 2| times in total length, length of head 2^ to 3. 

 Snout with convex upper profile, I3 to 1\ diameter of eye, which 

 is 3| to 4 times in length of head and 1| to 2 in interorbital vvidth ; 

 mouth moderate, f width of head, extending to between nostril and 

 eye ; 2 or 3 series of scales on the cheek ; large scales on the opercle. 

 Grill-rakers short, slender, 17 to 20 on lower part of anterior 

 arch. Dorsal XVI 10; last spine longest, f length of head. 

 Pectoral pointed, as long as head, extending as far as origin of anal. 

 Ventral reaching vent. Anal III 8-9 ; third spine a httle shorter 

 .than last dorsal. Caudal rounded, densely scaled. Caudal peduncle 



