TETEODON. 



545 



adults described above, and the black stripes are not so well denned, or may be replaced 

 by roundish spots. 



430 millimetres is the length of the largest specimen examined by me. 



Measurements (in millimetres). 



Total length (without caudal) 



Length of head 



Width of head 



Length of snout 



Diameter of eye 



Interorbital width 



Longest ray of dorsal 



„ ,, anal 



Length of pectoral 



,, caudal 



1. 



2. 



3. 



| 

 4. 



340 



290 



225 



160 | 



112 



86 



74 



57 j 



100 



82 



63 



46 



33 



25 



23 



19 



17 



12 



11 



10 



50 



36 



29 



20 



55 



45 



35 



22 ' 



58 



45 



33 



24 



53 



38 



27 



20 



90 



74 



62 



43 



120 



41 



37 



12 



9 



13 

 20 

 17 

 17 

 37 



95 

 34 

 30 

 10 

 6 

 11 

 14 

 15 

 12 

 92 



57 



23 

 21 



8 

 6 

 8 

 9 

 9 

 9 

 18 



35 



16 



15 



5 



5 



6 



6 



6 



6 



13 



1. Gondokoro. — Loat. 



2. Rosetta Nile. — Loat. 



3. Khartum. — Petherick. 



4. Abu Simbil. — Loat. 



5. Niger. — Allen. (Type of 



T. strigosus.) 



6. L. Chad.— Gosling. 



7. Goz-abu-Guma. — Loat. 



8. Fashoda. — Loat. 



Tetrodon fahaka inhabits the Nile from the Delta to Gondokoro. It is also known 

 from the Chad Basin, the Senegal, and the Congo. 

 List of specimens examined : — 



10 Freshwater pool near Ghet-el-Nassara, Lake Menzaleh. — Loat, 26.5-11.6.99. 



4 Nile.— Old Collection. 



5 Rosetta branch of Nile, downstream side of barrage. — Loat, 28-30.7.99. 

 1 Nile near Cairo. — Capt. Flower, 9.8.05. 



1 At a regulator near Luxor. — Loat, 10.11.01. 



1 Abu Simbril, Nubia.— Loat, 14.2.00. 



2 Khartum:— Petherick, 1862. 



1 Rosaires, Blue Nile.— Capt. Flower, 6.05. 



3 Goz-abu-Guma, White Nile. — Loat, 1.5.01. 

 54 Fashoda.— Loat, 19.1-31.3.01. 



1 Polkom, Baro R. (Sobat).— Zaphiro, 4.04. 



4 A 



