EXPLANATION OF THE PLATES. 



PLATE VII. 



Fig. 1. Marcusenius isidori, C. & V., p. 42. Rosetta Nile. Nat. size. 



Fig. 2. Gnathonemus pictus, Marcus., p. 48. Fashoda. Nat. size. 



Fig. 3. Gnathonemus cyprinoides, L., p, 50. Wasta. Skeleton. Nat. size. 



PLATE VIII. 



Fig. 1. Petrocephalus bovei, C. & V., p. 36. Kafr-el-Zayat. Nat. size. 

 Fig. 2. Petrocephalus keatingii, Blgr., p. 38. Fashoda. (Type.) Nat. size. 

 Fig. 3. Marcusenius petherici, Blgr., p. 45. Khartum. (Type.) Nat. size. 



PLATE IX. 



Fig. 1. Petrocephalus degeni, Blgr., p. 39. Katonga R., Lake Victoria. (Type.) 



Nat. size. 

 Fig. 2. Marcusenius nigricans, Blgr., p. 40. Katonga R., Lake Victoria. (Type.) 



Nat. size. 

 Fig. 3. Marcusenius harringtoni, Blgr., p. 44. Polkom, Baro River. (Type.) f nat. 



size. 



PLATE X. 



Fig. 1. Gnathonemus macrolepidotus, Peters, p. 53. Kavirondo Bay, Lake Victoria. 



(From an example in the Paris Museum.) Nat. size. 

 Fig. 2. Gnathonemus longibarhis, Hilg., p. 55. Buganga, Lake Victoria. Nat. size. 

 Fig. 3. Gnathonemus niger, Gthr., p. 57. Fashoda. Nat. size. 



PLATE XL 



Fig. 1. Mormyrus hasselquistii, C. & V., p. 59. Fashoda. Nat. size. 



Fig. 2. Mormyrus niloticus, Bl. Schn., p. 68. Between Beni Souef and Biba. ^ nat. 



size. 



PLATE XII. 



Fig. 1. Mormyrus kannume, Forsk., p. 61. Cairo, f nat. size. 

 Fig. 2. Mormyrus caschive, K, p. 66. Khartum, f nat. size. 



