30 MORMYKID.E. 



b. Teeth only in the middle of the jaws, '^-10 in each jaw. 



a, Body much elongate ; ventral fin nearer anal than pec-toral. 

 Month suhinferior ; dorsal fin a little longer 



than anal o. 7i7c/(^//^.«, Gill, p. aft. 



yS. Body short or more or less elongate; vential Hn e(jually distant from 

 pectoral and anal or nearer the former. 

 Mouth inferior or suhinferior, below level of 



eye ; teeth moderate or small ; posterior 



nostril remote from mouth 4. Marcuseiiiii.<, Gill, p. GO. 



Mouth inferior or suhinferior ; teeth small ; 



])Osterior (lower) nostril close to mouth . . a. Stomatorh'nuis, Blgr., p. 87. 

 Mouth inferior ; upper teeth small, conical, 



median pair of mandibular teeth very largo, 



incisor-like ; dorsal much longer than anal. (>. }fijomijrus, r>lo''-' P- '^-• 

 Mouth terminal ; dorsal and anal e(iual or sub- 



('(jual in length 7. Gnaflioneiniix^ (iill, p. [H. 



2. Teeth in jaws disposed in several rows 

 forming villiform bands ; dorsal and 

 anal fins nearlv ecpially developed . 8. Geni/om>irii<t, Rlgr., p. 12.">. 



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

 Mouth terminal lb Monni/ni.'<, L.. p. ll'ti. 



(?. Anal fin more than five times the length of the dorsal. 

 Mouth terminal ; palate and tongue with a 



pavement of large spheroid teeth .... 10. l/t/penyiisns, Gilj, p. Ml*. 



IT. G VMNARCHiNi'i:. — Ventral, anal, and caudal 

 fins absent; no teeth on the parasj)henoid 

 and tongue; body eel-shaped . . . .11. (ii/nDian-hiis, Ciw., \^. liA. 



1. MORMYROPS. 



Mot-jHi/nts, part., I^inn. Syst. Nat. i. p. 522 (17GG). 



Mormijrops, part., J. Miill. Arch. f. Nat. 1843, p. ;'.21 : Giinth. Cat. Fish. vi. 



p. 22;') (ISliC). 

 j\forini/roj>s, (iill, Proc. Ac. Philad. 18^2, p. 130 ; Peters, Peise i\Iossamb. iv. 



p. 88 (1808) ; Bouleng. Proc. Zool. Soc. 1898, p. 780, Poiss. Bass. Congo, 



p. 50 (1001), and Fish. Nile, p. 29 (1907). 

 0,iy)iio)'wi/ni.'<, Blcek. Versl. Ak. Amsterd. (2) viii. 1874, p. 3(»7. 



Teeth in the jaws conical, truncate, or notched, forming a singh^ 

 complete scries on the entire edge of both jaws (10-30 in each); 

 minute conical teeth on the parasphenoid and on the tongue ; mouth 

 terminal or suhinferior. Nostrils moderately far apart, remote from the 

 eye. Body more or less elongate; ventral fins equally distant from 



