564 EXPLANATION OF THE PLATES. 



PLATE VII. 



Fig. 1. Marcusenius isidori, C. & V., p. 42. Iiosetta 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. Petrocephahs 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 P., Lake Victoria. (Type.) 



Nat. size. 

 Fig. 2. Marcusenius nigricans, Blgr., p. 40. Katonga P., 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 longibarbis, Hilg., p. 55. Buganga, Lake Victoria. Nat. size. 

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



PLATE XL 



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

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



