256 
TEAVELS IN CENTEAL AFEICA. 
Mormyrus isidori, C. & V. 
D. 19—20. A. 24. L. lat. 55. 
Snout obtuse,, rounded,, compressed, short, but longer than the 
eye, which is rather small j cleft of the mouth at the lower side of 
the snout, below the front margin of the orbit. Teeth small, di- 
lated and notched, forming an arched series round the margin of 
both jaws. Pectoral extending to or somewhat beyond the middle 
of the ventral, which is not quite half as long as the pectoral. The 
height of the body is contained from twice and three-fourths to 
three times and one-third in the total length (without caudal), the 
length of the head four times and one -half. 
Mormyrus dorsalis, Geo fir. 
D. 13—16. A. 56—62. V. 6. L. lat. ca. 110. 
Snout obtuse, rather short, rounded, with the jaws equal ante- 
riorly, and without labial appendage. Eye small, situated far before 
the middle of the length of the head. Teeth not very small, fixed, 
dilated, notched. Pectoral extending beyond the root of the ven- 
tral, which is short, but more than half as long as the pectoral. 
The height of tlie body is contained from three times and three- 
fourths to five times in the total length (without caudal), the length 
of the head five times and one-half. The distance of the origin of 
the dorsal fin from the root of the caudal is one-half of its distance 
from the gill- opening. 
Mormyrus peter sit, Gthr. 
Easily distinguished by the prolongation of the lower jaw into a 
long cylindrical appendage. Originally described from West Afri- 
