2118 
One single antorbital each side entirely above nostril; 
2 suborbitals, larger anterior and small posterior 
organ, entirely separate or connected with each other 
by narrow string of black; antorbitals probably 
always large and narrowly separated. 
i 1 . No luminous scale at suprapectoral; 
front suborbital organ reaches 
nostril; anals 4 or 5 j 4. - - - - 
brachyceuhalus . 
2 
jl • Luminous scale at suprapectoral. 
1 
i . Eye moderate, 3 in head. 
. Depth 3 1/4; suborbital spot at 
middle of lower eye edge.- longleyi . 
2 
k~. Depth 4 1/3; no suborbital spot at 
middle of lower eye edge. - «* 
----------- - intermedius . 
2 
^ • Eye large, 2 3/5 to 2 4/5; antorbitals 
very large, circular, only narrowly 
separated in median. - - rafinesguii• 
One or 2 antorbitals, upper above nostril, very small or 
absent; separate narrow supraorbital organ along upper 
eye edge; long suborbital organ or suborbital extension 
of lower antorbital along lower orbital edge; circum- 
orbital organs:on:2 sides widely separated from each 
other. 
