468 
Analysis of species 
al. Space between dorsal and anal origins more than half 
of head. 
b 1 . Maxillary and mandibulary band of teeth longitud¬ 
inally divided by and edentulous groove* 
c^-. Dorsal origin nearer vent than gill opening. 
^bengalensls • 
c^. Dorsal origin nearer gill opening than vent. 
b^. Maxillary and mandibulary band of teeth without an 
edentulous groove. 
d 1 . Mouth cleft reaches hind border of eye (young), 
full grown about eye diameter behind eye. 
e 
Western Indian Ocean. 
East Indies. 
China, Formosa, Japan. 
aftguil2a£i£. 
celebesensis. 
japonica 
d^. Mouth cleft reaches even (adult) with hind 
border of eye. 
reinhardti• 
a2. Dorsal origin close before, above or behind vent; no 
edentulous groove within bands of jaw teeth. 
f 1 . Mouth cleft reaches beyond eye, eye 12 2/5. 
dussumieri. 
P 
f . Mouth cleft reaches hind border of pupil 
or not so far; eye 6 to V. 
spengeli 
f^. Mouth cleft reaches hind border of eye or 
farther; eye 8 to 12. 
australis • 
