Corythhoichthys haematopterus (Bleeker). 
‘Head 3 to 3z to vent 
31; rings 16 or 17 - 33 to 36; one abnormally 20 - £4; eye 
2 to 2+ in snout; pectoral 12 to 2; caudal 1 to 1 3/5. 
Body about wide as deep; upper keel each side of back 
to last third or 2/5 in dorsal length; median lateral keel 
from pectoral axil to first caudal ring midway along side, 
ends as upper caudal keel begins; breast and belly without 
median keel; lower lateral keel each side from head to cau- 
dal fin, uninterrupted; male with brood pouch over 15 to LO 
caudal rings. Head width 3 to 3 2/5 its length. Snout little 
less than rest of head. Eye moderately large, edges of sock- 
ets conspicuous. Mouth terminally superior. Maxillary small, 
inconspicuous, about long as pupil. Interorbital concave, 
without keel. Rostral keel above slight, highest behind and 
ends close before eye. Opercle without keel and with many 
striae, mostly radiating below; high and conspicuous occip- 
ital keel with 2 notches at segment junctures. Gill-opening 
J I 2 
small horizontal slit, high, above pectoral origin eye- 
diameter or slightly more. Rings firm, without spines or 
keels and each with many fine transverse striae. Dorsal 
inserted entirely on caudal rings, begins usually at front 
of first and extends over 5 to 7. Anal rudimentary. Caudal 
rounded convexly behind. 
Color in Alcohol: faded dull brownish, under surface 
slightly paler. Scattered obsolete darker brownish specks. 
Seven examples from Samoa, 72 to 98 mm. Color sketch by 
Drayton says Opolu, November 18389. 
