EXPLANATION OF THE PLATES. 



PLATE LI. 



Fig. 1. Clarias robecchii, Vincig., p. 285. Unfras R., Lake Tsana. Nat. size. 



a. Upper view of head, nat. size; b. Dentition, nat. size. 

 Fig. 2. Clarias tsanensis, Blgr., p. 293. Zegi, Lake Tsana. (Type.) -§■ nat. size. 



a. Upper view of head, f- nat. size; b. Dentition, nat. size. 



PLATE LII. 



Clarias lazera, C. & V., p. 288.— 1. Adult, Damietta, f nat. size; a. Upper view of 

 head, f nat. size; b. Dentition, nat. size. — 2. Dentition of another 

 specimen from the same locality. — 3. Young, Ghet-el-Nassara, Lake 

 Menzaleh, nat. size. 



PLATE LIII. 



Fig. 1. Clarias carsonii, Blgr., p. 294. Lake Victoria, a. Upper view of head. 



Fig. 2. Clarias alluaudi, Blgr., p. 296. Bunjako, Lake Victoria. (Type.) a. Upper 



view of head. 

 Fig. 3. Clarias werneri, Blgr., p. 297. Bunjako, Lake Victoria. (Type.) a. Upper 



view T of head. 



All nat. size. 



PLATE LIV. 



Fig. 1. Heterobranchus bidorsalis, Geoffr., p. 300. Goz Shebesha, White Nile. 



f nat. size. 

 Fig. 2. Heterobranchus longifilis, C. & V., p. 303. Luxor. Nat. size. 



PLATE LV. 



Fig. 1. Eutropms niloticus, Riipp., p. 306. Debud, Nubia, f nat. size. 

 Fig. 2. Schilbe uranoscopus, Biipp., p. 315. Mouth of Lake No. f nat. size. 



PLATE LVI. 



Fig. 1. Schilbe mystus, L., p. 311. Barrage near Cairo, f nat. size. 

 Fig. 2. Siluranodon auritus, Geoffr., p. 318. Barrage near Cairo. Nat. size. 



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