The Freshwater Fishes of South Africa. 323 



Quellimane, Licuare, and Zambeze. . . . It buries itself during the dry 

 season in the mud and surrounds itself with a protective coat of 

 slime until the return of the rainy season. The formation of this 

 coat and the giving out of a screaming (kreischend) sound have been 

 observed by McDonnell (Zeits. f. Wiss. Zool. Leipzig, I860, x., 

 p. 409) and A. Dumeril (Compt. Eend. Ac. Paris, 1866, Ixii., p. 97), 

 but not by me." 



OBDEE TELEOSTEL 

 FAMILY MOEMYEID^E. 



Synopsis of Genera. 



A. Anal fin f to twice the length of the dorsal. 



(a) Teeth on the entire edge of both jaws ; 10-36 in each jaw. 

 Mouth terminal or sub-inferior; nostrils distant from each 



other and remote from the eye ; body more or less elongate 1. Mormyrops. 



Mouth inferior, below the eyes ; nostrils close together, close to 



the eye ; body short 2. Petrocephalm. 



(b) Teeth only in the middle of the jaws ; 3-10 in each jaw. 

 Mouth inferior or sub-inferior, below level of eye ; teeth 



moderate or small ; posterior nostril remote from month 3. Ularcusenius. 



Mouth terminal ; dorsal and anal equal or sub-equal in length 4. Gnathonemus. 



B. Anal fin less than J the length of the dorsal. 



Mouth terminal 5. Mormyrus. 



I. MORMYEOPS. 



Mormyrus, part., Linn. Syst. Nat., i., p. 522 (1766). 

 Mormyrops, part., J. Miill., Arch. f. Nat., 1843, p. 324. 

 Mormyrops, Bouleng., Cat. Freshw. Fish. Afr., i., p. 30 (1909). 



"Teeth in jaws conical, truncate, or notched; minute conical 

 teeth on parasphenoid and tongue ; on the entire edge of both jaws. 

 Mouth terminal or sub-inferior ; nostrils moderately far apart, 

 remote from the eye. Body more or less elongate." 



MORMYROPS DELICIOSUS, Leach. 



Oxyrhynchus deliciosus, Leach, in Tuckey, Exped. R. Zaire, p. 410 

 (1818): 



Mormyrus tuckeyi, Cuv. and Val., Hist. Poiss., xix., p. 263 (1846). 



