887 
fishes. BRANCHIOSTEGQUS. 56. Morniyrus. 
ORDER V. BRANCHIOSTEGOUS. 
Gills 'without bony rays, 
56. MORMYRUS. Head fmooth : teeth 
numerous, notched ; aperure of the 
gills linear, without a cover: gill-mem- 
brane with one ray *- body fcaly, 
C- 
bifid, appendaged. 
• Inhabits the Nik. 
DorJ. 1:7: pcd. 9: vent. 6:, an. 32: caud. 19 rays. 
Tail bifid, obtiife; dorfal fin with 26 rays. 
Inhabits the Nile. 
Dorf, 26 ; peB. 10 : vent, 6 : an. 41 : caud. 10 rays, 
Tail bifid, obtufe ; dorfal fin with 63 fays. 
Inhabits the Nik; body whitish and very much comprefied. 
Aperture of tha gills perpendicular j^oMf conic, deflefted j 
lower (/ip longer ; bellj/ ftraight, but riling from the vent ; 
lateral line ftraight, in the middle of the body ; tail and 
dorfal fin linear. 
Dorf. 63, peB, 15, vent. 6, an, 17, caud. 20 rays. 
I 
SuiL 
'‘^des. 
57. OSTRACION. 
