ON THE SPECIES OF THE GENUS ANOSTOMUS. 17 
3 . mouth directed forward, lower jaw little if any longer ; 
lower teeth short, broad, crenulate (Schizodon). 
series of scales 4 from L.l. to D. ; 
transversely banded with brown ; 
bands 3, a caudal band . . viltalus. 
bands 4, a caudal spot . fasdatus. 
bands blotch-like, no caudal spot 
dissimilis. 
series of scales 6 from L.l. to D. ; 
transverse bands absent ; 
rows of scales 5 between L.l. and V. 
isognathus. 
rows of scales 4 between L.l. and V. 
platm. 
mouth directed obliquely downward and forward, 
lower jaw shorter ; 
series of scales 5 from L.l. to D. . nasutus. 
(Anostomus.) 
Anostomus salmoneus Gron. 
Without a specimen of this species at hand it is not pos- 
sible to give the characters of the teeth, these having been 
unnoticed by previous writers. If they agree with those 
of the following species, as may be expected, the crenula- 
tion will be added to the distinouishimj; characteristics in 
the diao^nosis of the subgenus. 
Anostomus trimaculatus Kn. ; Gth. 
Mouth directed upward ; snout elongate, nearly round 
in transverse section in front of the eyes, about twice the 
length of the eye ; teeth crenulate in both jaws. The 
formula as taken from a specimen from Gurupa is D. 12 
ESSEX INST. BULLETIN, VOL. XXII 2 
