Corythkoichthys mataafae Jordan and Seale. 
Hesd 34 to vent; depth 2 in head; D. 22; rings 16 - 
snout 22in head; eye lz in snout; pectoral 1 2/5. 
Body moderately compressed; upper keel each side of 
to last third in dorsal, replaced close below by similer 
parallel caudal keel beginning opposite dorsal origin; 
median lateral keel from pectoral axil , deflected below 
on first caudal ring to lower tail edge and then continued 
to caudal base; lower late keel each side 
on first caudal keel inferiorly; median ventral keel complete 
from head to vent. Head width 2 1/8 its length, upper profile 
strongly concave before eye. Snout much shorter than post- 
orbital, with median keel above and behind. Eye large, with 
conspicuous edge to sockets. Mouth terminally superior, small. 
Interorbital concave; head with strong keel below, but not 
extended behind eyes; opercle with med 
few striae above and many radiate below; slight occipital 
keel and small nuchal on first two rings. Gill-opening mod- 
erate slit, little inclined, about long as pupil and some 
distance above and little before pectoral origin. Rings firm, 
without spines on keels and each with fine transverse striae. 
Dorsal on first 5 caudal rings. 
Color in alcohol: faded largely uniform deep brown. 
so 
Length 53 mm. One from To 
