106 MR. G. A. BOTJLENGEE OlST THE AFBlCAJf ANB [Peb. 7, 



Synopsis of the Species. 



I. Scales cycloid, without marginal denticulation ; 

 third anal spine not longer than longest dorsal 

 spine. 



A. Gill-rakers 15 to 25 on lower part of anterior 



arch ; 2 or 3 series of scales on the cheek. 



1. Anal spines 4 ; pectoral not longer than 



head, not extending to origin of anal ; 



dorsal XV-XVII 10-12. 



Teeth in 7 or 8 series ; caudal peduncle a little 



longer than deep ; maxillary extending to between 



nostril and eye ; diameter of eye 5 times in length of 



head; Sq. 35|p 1. hunteri Qdhx. 



Teeth in 4 or 5 series ; caudal peduncle slightly deeper 

 than long; maxillary extending nearly to below 

 anterior border of eye ; diameter of eye 5 to 5f 



times in length of head; Sq. 32 "Y^ 2. nigraOc^v. 



Teeth in 5 to 7 series ; caudal peduncle not longer 

 than deep ; maxillary extending to between nostril 

 and eye ; diameter of eye 4 to 4^^ times in length of 



Q 



head; Sq. 31-32 j^ 3. shirana 'Bigs. 



B. Anal spines 3 (exceptionally 4 in T. mossam- 



bica). 



1. Dorsal XV-XVIII 10-14; pectoral extend- 

 ing to origin of anal or beyond. 



a. Caudal rounded, the membrane between 



the rays scaleless, except at the base. 

 Pectoral not longer than head ; mouth large, nearly 



as bi-oad as head ; Sq. 30 33,-f-? 4. mossambica Ftvs. 



^ 13-lo 



Pectoral at least as long as head ; mouth | to | width 



ofhead; Sq. 31-35,4^- b. niloticajj. 



' ^ 14-lo 



b. Caudal truncate or slightly emarginate ; 



pectoral at least as long as head. 

 a. Caudal peduncle at least as long as 

 deep. 



Sq. 32-33 jg^^^ ; lat. 1. -g^ ; dorsal spines equal in 



length from the sixth 6. tanganicce Gthr. 



Sq. 31-34 |t^| ; lat. 1. j^ ; last dorsal spine longest. 7. natalensis M. Web. 



/3. Caudal peduncle deeper than long. 



* Maxillary not extending to below 



anterior border of eye. 



3- 

 t Sq. 31-34 ~r. ; mouth not more 



^ 14-15 



than half as broad as head 8. galilcea Hasselq. 



tt Sq. 28-30 ^. 



Depth of body much greater than length of head ; 



last dorsal spine longest , 9. microcephala'Si'kr, 



Depth of body not much greater than length of head ; 



• last dorsal spine longest 10. macrocephala Blgr. 



Depth of body much greater than length of head ; 



dorsal spines nearly equal in length from the sixth. 11. nigripinnis A. Dum. 



