48 



lAIORMTRID.E. 



B. Diameter of eye slightl}^ less than length of snout. 

 J). 27 ; A. 29 ; L. 1. 40 ; teeth .^ 10. P. r/liroUh's, Yincig., p. 58. 



IT. Dorsal and anal originating in the same vertical. 

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



peduncle ; teeth ,^^ 11. P. dc^/eni, Blgr., p. 58. 



1. PETROCEPHALUS BANE. 

 ]{lonni/riis hane, Lacep. Hist. Poiss. v. p. 020 (1803) ; Cuv. k, Val. Hist. Poiss. 



xix. }). 27t') (181()); Giinth. Cat. Fish. vi. p. 220 (1800), and Petherick's Trav. 



ii. p. 251 (18(;'J). 

 Mormyrus cijpnno'ules (non L.), I. Geoffr. Descr. Egypte, Poiss. p. 277, pi. viii. 



figs. 3 & 4 (1827). 

 Mormyrits de(j>ie.'<7u', Cuv. & Val. t. c. p. 281. 

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

 Mormyrtis ehrenhergiiy (Juv. & Val. t. c. p. 283. 

 Pet race phalns hane, Marciisen, Bull. Ac. St. Petersh. xii. 1851, ]). 14, and Mem. 



Ac. St. Petersb. (7) vii. 18(M, no. 4, p. IIO ; Bo)ileiig. Proc. Zool. Soc. 1898, 



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

 Petrocejyhcdus dequesne, Marcuson, l>ull. ]>. 14. 

 Petrocephalus dejoannis, Marcusen, 1. c. 

 I\'trorejduih(s ehr(')d>e>y'n, I\Iarcusen, 1. c. 



Pier. 34. 



Petrocephalus hane. 

 Cairo (F. N.). |. 



Depth of body '2h to 3J times in total leno:th, length of head ojto 4^ 

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

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

 mouth; mouth situated belo^v the eye, its width J-f length of heid ; 

 teeth bicuspid, li-'l'l in U[)per jaw, 2--30 in lower; nostrils on 



