EXPLANATION OF THE PLATES. 571 



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.) f nat. size. 



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



PLATE LIL 



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 carsoniU 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 of head. 



All nat. size. 



PLATE LIV. 



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

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



PLATE LVI. 



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

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



4d2 



