428 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
a length, 2.9 to 3.05; orbit, 3.5 to 3:9 in head, 1.3 to 
1.55 in snout; maxillary, 3.7 to 4.05 in head; distance 
from anus to anal, 2.9 to 3.7 in distance from anus — 
to base of outer ventral ray____________sexradiatus. 
«. Two posterior saddle-like markings very distinct, 
strikingly ocellated; pectoral rays, 16 or 17; ventral 
rays, 7; anterolateral portion of snout largely 
prickly; scaleless ventral fossa shorter, extending 
forward only to opposite posterior end of ventral 
bases. 
l. Snout shorter and blunter, its preocular length 2.71 
in head; its preoral length 3.0; orbit, 3.4 in head; 
1.28 in snout; maxillary, 3.75 in head; distance 
from anus to ‘anal, 1.6 in distance from anus to 
base’. of outer sventral “ray ee notatus. 
V’. Snout much longer and sharper, its preocular length 
2.32, its preoral length 2.45, in head; orbit, 3.6 in 
head, 1.6 in snout; maxillary, 4.5 in head; dis- 
tance from anus to anal, 2.6 in distance from anus 
to base of outer ventral ray__________ triocellatus. 
h?, No scaleless ventral fossa in region anterior to peritroct; 
dorsal spine produced into a long filament in only one 
species (C. dorsalis). 
m*. Dorsal contour of snout convex; orbit smaller, 3.3 
to 3.8 in head, shorter than postorbital; snout 
narrower, its width at base 2.7 to 3.05 in head; 
interorbital narrower, 1.5 to 1.8 in postorbital ; 
suborbital narrower, 2.6 to 2.7 in postorbital; 53 
or 64 scales above lateral line; carinae on scales 
well developed; anterolateral region of snout 
largely prickly. 
mv. Second dorsal spine. produced into a filament, 
about as long as head; 64 scales in series 
above lateral line; snout more strongly convex 
laterally, the distance between the prominent 
anterolateral angles greater than distance an- 
teriorie? theme 22. 2 eee dorsalis. 
nv’. Second dorsal spine without filament, much 
shorter than head; 54 scales in a series above 
lateral line ; snout less strongly convex laterally ; 
the distance between anterolateral angles less 
than the distance anterior to them___~- argus. 
nv’. Dorsal contour of snout straight; orbit larger, 
3.05 to 3.3 in head, longer than postorbital; in- 
terorbital, 1.3 to 1.5 in postorbital; suborbital, 
2.0 to 2.3 in postorbital ; 44 scales in a row above 
lateral line series; carinae on scales obsolescent ; 
anterolateral region of snout largely scaleless ; 
dorsal spine not filamentous___----_~ macrolepis. 
e’. Snout more than twice as long as orbit; 74 scales in a series 
between origin of second dorsal and the lateral line scales; 
first dorsal fin black distally; second dorsal fin as high an- 
teriorly as the anal; one Hawaiian species____----_- gladius. 
SS a 
Wy 
