PABATILAPIA. 347 



of scales on the cheek, width of scaly part equal to diameter of eye. 

 Gill-rakers short and stout, the larger T-shaped, 7 to 9 on lower part of 

 anterior arch. Dorsal XV-XVI 8-10 ; spines subequal in length from 

 the seventh or eighth, or increasing in length to the last, about | length 

 of head ; longest soft rays \ to § length of head. Anal III 8-9 ; third 

 spine as long as and stronger than longest dorsal. Pectoral as long as 

 or a little shorter than head, extending to vertical of origin of anal. 

 Ventral reaching vent or origin of anal. Caudal rounded-subtruncate, 

 upper rays usually longer than lower. Caudal peduncle 1^ to \\ times 

 as long as deep. Scales feebly denticulate, 31-35 jjrjTj ; lateral lines 

 T7T-14- Bright yellow, irregularly blotched or marbled with black, the 

 black sometimes forming irregular cross-bands on the body; one or two 

 pale yellow ocellar spots sometimes present on the anal tin. 



Total length 155 millim. 



Lake Victoria and Victoria Nile. 



1-10. Types. Bunjako. Mr. E. Degcn (('.). 



11-14. Types. Buganga. „ 



15. Ad. Sesse Ids. Dr. E. Bayon (C.) ; 



Genoa Museum (P.). 



16. Ad. Jhija, Ripon Falls. 



29. PARATILAHA RETRODENS. 

 Hilgend. Sitzb. Ges. nat. Fr. BerJ. 1888, p. 76 ; Bouleng. Proc. Zool. Soc. 1898, 



p. 142 ; Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 267 ; Bouleng. Fish. 



Nile, p. 480, pi. lxxxix. fig. 2 (1907), and Ann. Mus. Genova, (3) v. 1911, 



p. 67. 

 Hemichromis retrodens, Pfeff. Tlrierw. O.-Afr., Fische, p. 19 (1896). 



Depth of body 2^ to 3 times in total length, length of head 3 to 3J 

 times. Head about twice as long as broad, upper profile convex, 

 strongly curved ; snout broader than long, as long as or a little longer 

 than eye, which is 3^ to 4 times in length of head, a little less than 

 interorbital width, and exceeds prseorbital depth ; mouth not very 

 oblique, with very thick lips, extending to below anterior border of eye, 

 or not quite so far; teeth in 6 to 8 series, 26 to 40 in outer row of 

 upper jaw, outer large and conical in the adult, sometimes oblique on 

 the sides, more or less distinctly bicuspid in the young, the others 

 conical or tricuspid ; 4 to 6 series of scales on the cheek, width of scaly 

 part equal to diameter of eye. Gill-rakers short and stout, the larger 

 bifid or T- or anvil-shaped, 8 or 9 on lower part of anterior arch. 



