OF FISHES FKOM LAKE TANGANYIKA. 571 



some suggestion of green, especially posteriorly; scales in dorsal region outlined 

 with darker ; dorsal and anal fins dull red, tipped with black ; ventrals dark but 

 reddish." 



66. SlMOCHEOMIS DIAGRAMMA Gthr. 



Numerous specimens, measuring from 75 to 185 millim., from Niamkolo, Sumbu, 

 Vua, and Pembe. Native names: Imjmma, Mbarama, Modi, Tempendi, Kikalakala. 



A female, measuring 92 millim., carries a few embryos in the mouth, these measuring 

 10 millim. and the vitelline sac 3^-. 



Dr. Cunnington has taken the following notes on fresh specimens: — "Olive above, 

 lighter below, but with the scales in the dorsal region darker on the overlap ; some 

 9 or 10 rather faint vertical darker stripes on the body; dorsal with brownish spots, 

 tipped black ; anal with dark red border and two red spots posteriorly ; caudal darker 

 in the posterior third." Other specimens, of the male sex, are " Greyish above, shading 

 to lighter, almost white below ; all scales with olive outlines ; head dark above ; 

 pectoral and ventral fins with red upper margins ; dorsal tipped red and black ; 

 anterior and lower margin of anal bright red, tipped with black." Females have the 

 " Paired fins and the anal olive, the dorsal tipped yellow and black." 



67. TlLAPIA NILOTICA L. 



A perfectly typical specimen from Lofu, measuring 310 millim., with dorsal XYII 12, 

 anal III 10, and 23 gill-rakers on lower part of anterior arch. According to 

 Dr. Cunnington, the fish grows to 390 millim. and occurs not only in Tanganyika 

 itself but also in a small lake and in overflowed rivers near Kombe, on the east 

 coast. Native name : Kivmbwi. 



T. nilotica, which has a wide distribution in Africa and Syria, had not previously 

 been recorded from further south than Lake Kivu, where specimens were collected 

 by Mr. Moore. 



68. Tilapia burtoni Gthr. 



Several specimens from Kituta and Kakonde River, Mtondwe Bay. Native names : 

 Fwili and Sidia. 



69. Tilapia latifrons, sp. n. (Plate XL.) 



Depth of body barely twice in total length, length of head 3^ times. Profile of 

 snout descending in a steep, straight line ; eye twice in length of snout, 5 times in 

 length of head, twice and \ in interorbital width ; mouth extending to between nostril 

 and eye ; outer teeth strong, bicuspid, followed, after an interspace, by small tricuspid 

 teeth forming 5 series in the upper jaw and 4 in the lower ; 3 series of scales on the 

 cheek; large scales on the opercle. Gill-rakers short, 9 on lower part of anterior 

 arch. Dorsal XVI 13 ; spines strong, increasing in length to the last, which measures £ 



4g 2 



