428 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



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. 



k . 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. 



1 1 . 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 ventral ray notatus. 



1 2 . 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 irioccllatus. 



h 2 . No scaleless ventral fossa in region anterior to peritroct ; 

 dorsal spine produced into a long filament in only one 

 species (C. dorsalis). 



m 1 . 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 ; 5J 

 or 61 scales above lateral line ; carinae on scales 

 well developed ; anterolateral region of snout 

 largely prickly. 

 n 1 . Second dorsal spine produced into a filament, 

 about as long as head ; 6| scales in series 

 above lateral line ; snout more strongly convex 

 laterally, the distance between the prominent 

 anterolateral angles greater than distance an- 

 terior to them dorsalis. 



n 2 . Second dorsal spine without filament, much 

 shorter than head ; 5i 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. 



m*. 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 ; 4* 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 ; 7£ 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. 



