Dorsal origin about midway between snout tip and adipose 
fin origin, fin reaching 13 to 2 to adipose fin. Latter 
about long as snout.. Anal origin midway between first 
dorsal origin and caudal base, slightly more posterior 
in small examples. Pectoral reaches 1+ to 1 2/3 to vent- 
ral and latter inserted about midway between front eye edge 
and caudal base, nearly reaches anal. Color in alcohol: 
brownish above. Sides and under surface whitish, former 
silvered. Iris brownish, also barbels. Fins brown. Two ex- 
amples 155 to 188 mm. These without data though likely 
from Peru? 
Tachysurus leiotetocephalus (Bleeker). 
Head 3 1/5; depth 4%; D. I, 7; A. v, 11; Snout 23 
in head; eye 6 1/3; Maxillary 4 2/5; interorbitel 2. 
x 
Body moderately elongate, well compressed. Caudal 
peduncle well compressed, least depth 3 2/5 in head, 134 
in its own length. Head width 12 its length. Snout broad, 
rather depressed, length = its width. Eye rather low, 23 
in snout, hind pupil edge about midway in head length. Mouth 
broad with short gape about to hind nostril, latter near first 
third in snout. Upper jaw protruding. Teeth lanceolate ,slen- 
derly pointed, in bands in jaws; small pateh of rather obtuse 
teeth each side of vomer, well seperated; palatin patch 4 or 
o times as long, of larger and more blunt teeth, each patch 
well separated. Mexillary barbel to pectoral origin, outer 
