43 



MORMYRID.E. 



B. Diameter of eye slightly less than length of snout. 

 D. 27 ; A. 29 ; L. 1. 40 ; teeth || 10. P. gliroides, Vincig., p. 58. 



24 



II. Dorsal and anal originating in the same vertical. 

 D. 19 ; A. 27 ; L. 1. 41 ; 12 scales round caudal 



peduncle ; teeth ^ 11. P. degeni, Blgr., p. 58. 



1. PETROCEPHALUS BANE. 

 Mormyrus bane, Lacep. Hist. Poiss. v. p. 620 (1803) ; Cuv. & Val. Hist. Poiss. 



xix. p. 276 (1846) ■ Giinth. Cut. Fish. vi. p. 220 (1866), and Petherick's Trav. 



ii. p. 254 (1869). 

 Mormyrus cyprinoides (non L.), I. Gleoffr. Descr. Egypte, Poiss. p. 277, pi. viii. 



figs. 3 & 4 (1827). 

 Mormyrus dequesne, Guv. & Val. t. c. p. 281. 

 Mormyrus joannisii, Cuv. & Val. t. c. p. 282. 

 Mormyrus ehrenbergii, Cuv. & Val. t. c. p. 283. 

 Petrocephalus bane, Marcusen, Bull. Ac. St. Petersb. xii. 1854, p. 14, and Mem. 



Ac. St. Petersb. (7) vii. 1864, no. 4, p. 146 ; Bouleng. Proc. Zool. Soc. 1898, 



p. 788, and Fish. Nile, p. 32, pi. vi. fig. 1 (1907). 

 Petrocephalus dequesne, Marcusen, Bull. p. 14. 

 Petrocephalus dejoannis, Marcusen, 1. c. 

 P etrocephalus ehrenbergii, Marcusen, 1. c. 



Fig. 34. 



Petrocephalus bane. 

 Cairo (F. N.). f . 



Depth of body 1\ to 3£ times in total length, length of head 3-f-to 4| 

 times. Head as long as deep or a little deeper than long, rounded ; 

 snout very short, \ to \ length of head, rounded, projecting beyond the 

 mouth ; mouth situated below the eye, its width \- f- length of head ; 

 teeth bicuspid, 14-22 in upper jaw, 22-30 in lower; nostrils on 



