EXPLANATION OF THE PLATES. 



PLATE LXXI. 



Fig. 1. Synodontis nigrita, C. & V., p. 366. Tonga, White Nile. Nat. size. a. Open 



mouth, XH« 

 Fig. 2. Synodontis serratus, Eiipp., p. 372. Abu Simbel, Nubia. Skeleton, f nat. size. 



PLATE LXXII. 



Synodontis sorex, Gthr., p. 375. Mouth of Lake No. f nat. size. With upper view 

 of head, f nat. size, and open mouth, nat. size. 



PLATE LXXIII. 



Synodontis clarias, L., p. 377. Mouth of Lake No. With upper view of head and 

 open mouth. Nat. size. 



PLATE LXXIV. 



Synodontis batensoda, Riipp., p. 380. Mouth of Lake No. With upper view of head, 

 nat. size, and open mouth, x 1}. 



PLATE LXXV. 



Synodontis membranaceus, Geoffr., p. 383. Khartum, f nat. size. With upper 

 view of head, f nat. size, and open mouth, nat. size. 



PLATE LXXVL 



Fig. 1. Chiloglanis niloticus, Blgr., p. 386. Arko. (Type.) Nat. size. a. Upper 

 view of head and anterior part of body, X 2 \ ; b. Open mouth, X 2J. 



Fig. 2. Mochocus niloticus, Joann., p. 388. Luxor. Nat. size. a. Upper view of 

 head and anterior part of body, x 2. 



Fig. 3. Mochocus brevis, Blgr., p. 390. Fashoda. (Type.) X If. a. Upper view of 

 head and anterior part of body, X 3. 



Fig. 4. Andersonia fep^ra, Blgr., p. 392. Kosheh. (Type.) Nat. size. a. Side view 

 of head and anterior part of body, X 3 ; b. Upper view of head and anterior 

 part of body, X 3 ; <?. Lower view of head and anterior part of body, x 3. 



