116 



CHAKACINID.E. 



Measurements (in millimetres) and numbers of fin-rays and scales in A. sethente. 



Total length 



Greatest depth 



Length of head 



Width of head 



Length of snout 



Diameter of eye 



Interorbital width 



Longest ray of dorsal 



„ „ anal . . 



Length of pectoral 



Number of branched rays in anal 



„ scales in lateral line 



„ ?? in transverse line above lateral line 



j» ,> „ „ below lateral line 



„ „ between lateral line and ventral . , 



1, 2, 8. Gambia. — Budgett. 



3. Lake Chad. — Gosling. 



4. Jebba, Upp. Niger. — Christy. 



1. 



370 

 105 

 70 

 37 

 20 

 17 

 28 

 68 

 36 

 64 

 17 

 45 

 8| 



H 



2 



2. 



3. 



265 265 



82 



240 



62 

 48 

 24 

 14 

 12 

 17 

 44 

 25 

 40 

 19 

 48 



H 



2 



5. 



115 



29 



2b 



11 



7 



7 



9 



23 



12 



20 



21 



6. 



105 



2o 



22 



10 



6 



6 



8 



20 



11 



19 



21 



47 



2 



7. 



100 



25 



24 



10 



6 



7 



9 



20 



11 



19 



19 



48 



2 



83 



23 



20 



9 



17 

 10 

 16 

 17 

 46 

 H 



H 



2 



5, 6. Kaedi, Senegal. — Delhez. 

 7. St. Louis, Senegal. — Delhez. 



List of specimens examined : — 



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



1 Barrage near Cairo, upstream side. — Loat, 4.9.99. 



1 Trench near Cairo. — Loat, 21.10.99. 



4 Canal by side of road leading from Cairo to Pyramids of Giza. — Loat, 7.3.99. 

 3 Canal in Zoological Gardens, Giza. — Loat, 14.3.99. 



1 Birket Karun, Fayum. — Loat, 1.10.99. 



3 Bahr Tamiyeb, Fayum.— Loat, 6.10.99. 



5 At regulators near Luxor.— Loat, 12.10.00-10.11.00. 

 1 Belanya, Nubia.— Loat, 14.2.00. 



3 Khartum.— Petherick, 1862. 



11 Omdurman. — Loat, 21.5.01. 



