1210 
Analysis of species 
a . Tail equals, 1/3 longer or somewhat shorter 
than head and trunk. 
b . Uniform black or brown; dorsal origin 
above or behind gill openings. 
1 
c , No white spot near mouth corner. 
nigra. 
2 -*- 
c . White spot near mouth corner. 
» 
rhod ochilus. 
p 
b . Marbled or mottled darker; dorsal origin 
before gill openings. 
1 
d . Dorsal origin far before gill open¬ 
ings; premaxillary teeth in cres¬ 
cent, enclosing 2 strong teeth in 
middle; vomerine teeth blserial. 
delicatula. 
d‘ J . Dorsal origin shortly before gill 
openings; premaxillary teeth in 
group; vomerine teeth biserial. 
amblyodon. 
3 --- c -- 
b . Spotted; dorsal origin before gill open¬ 
ings; premaxillary teeth in crescent 
with 1 or 2 central; tail somewhat 
shorter than head and trunk. 
