BO 
Indiana University Studies 
an enlarged tooth followed by 3 smaller ones, all apparently 
with a single broadly rounded cusp ; 4 or 5 scales with distinct 
pores ; gill membranes free from the isthmus and partly from 
each other; predorsal line not scaled (this may be due to the 
forms being immature) ; origin of the dorsal slightly nearer 
the tip of the snout than to the base of the caudal ; pectorals 
fleshy, flaps edged with filaments, not reaching ventrals ; ven- 
trals not near to anal; anal truncate; depth of the caudal 
peduncle equal to its width. 
Sides with 8 transverse bands, the first above the upper 
angle of the gill opening, the second one-half the distance be- 
tween the base of the head and the dorsal origin, the third 
just in front of the dorsal, the fourth thru the middle of the 
dorsal and continued on the dorsal as a bar, the fifth slightly 
back of the dorsal, the sixth in front of the adipose, the 
seventh just back of the base of the adipose, the eighth at the 
base of the caudal ; a dark line from the chin to the eye and 
from the eye to the upper angle of the gill opening; the base 
of the caudal with a blank band, blackest at the base of the 
middle caudal rays; adipose edged with black above and pos- 
teriorly leaving the lower center hyaline; anal covered with 
chromatophores, thickest on the interradial membrane except 
at the tip of the first few anal rays. 
Schizodon dissimilis Garman. 
17221, 3, 70-90 mm., Cachuela Esperanza. Mar., 1922. 
Rhytiodus microlepis Kner. 
17223, 1, 123 mm., Cachuela Esperanza. Mar., 1922. 
Subfamily leporinin^e. 
Leporinus striatus Kner. 
17152, 12, 82-145 mm., Huachi. Aug., 1921. 
17153, 11, 100-150 mm., Rio Colorado, Lower Bopi. Sept., 1921. 
17154, 5, 65-110 mm., Ixiamas. Dec., 1921. 
17155, 2, 62 and 72 mm., Rurrenabaque. Oct., 1921. 
Leporinus frederici (Bloch) . 
17156, 13, 120-200 mm., Huachi, Bolivia. Aug., 1921. 
17157, 1, 205 mm., Reyes, Bolivia. Nov., 1921. 
17158, 1, 200 mm., Ixiamas, Bolivia. Dec., 1921. 
17159, 1, 180 mm., Lagoons, Lake Rogoagua. Nov., 1921. 
17160, 2, 235 and 245 mm., Ivon, Bolivia. Feb., 1922. 
