MO FLATFISHES (HICTEROSOMATA) 



II. Gill-rakers pointed, longer than broad. 



.\. Scales all cycloid ; canines very small ... -). tDitiixistniiH. 



H. Scales of ocular side more or less ctenoid, at least anteriorly ;iiul at edges 

 of body. 



1. .\nterior rays of dorsal longer than those that follow and free from 



membrane; 23 to 25 gill-rakers on lower part of anterior arch; 

 depth li to if in length. 



a. Scales cycloid on blind side, except anteriorly and at edges of body : 



3 conspicuous ocelli on body . . . . ■ ,t tnoccltatus. 



b- Scales all ctenoid on blind side ; body with dark rings but no 



conspicuous ocelli ....... ti. annnlatus. 



2. .\ntenor rays of dorsal not prolonged, never entirely free from 



membrane ; 5 to 18 giU-rakers on lower part of anterior arch ; 

 depth if to 2^ in length. 

 <(. Scales of blind side ctenoid, 



n. Depth if to 2, head 3J to 3! in length ; pectoral of blind side 



I J to about 2 in head ; dorsal 71-77, anal 33-fii 7. walaviiiins. 



(3. Depth 2 to 2^, head 3^ to 3I in length ; pectoral of blind side 



2j to 2j in head ; dorsal 78-82, anal O1-65 . 8. olii;iHl:i>:. 



b. Scales of blind side cvcloid. 



(1 Origin of dorsal above or a little in front of nostnls of lilind side, 

 well in advance of eye, 

 * Teeth strong, rather w-idely set, canines large ; '» to it> teeth 

 on blind side of lower jaw . 

 I Dorsal 68-70, anal 52-55 ; tip of first interha'mal spine 

 projecting ; maxillary about 2 in head ; head 3^ in 

 length ; caudal peduncle about twice as deep as long 



g. quinquocellatus. 

 tt Dorsal 78, anal 59 ; tip of first interha'mal spine project- 

 ing ; maxillan.- about i J in head ; head more than 

 4J in length ..... 10, ctoiosqiiaiins. 



ttt Dorsal 72-80, anal 54-O2 ; tip of first interhEemal spine 

 feeble, not projecting ; maxillary 2i to 2| in head ; head 

 3 J to 3 J in length ; caudal peduncle 2 J to 3! times as 

 deep as long . . . . . . 11. nnins. 



** Teeth smaller, more close-set, nut much enlarged anteriorlv , 

 usually more than 20 teeth on blind side of lower jaw. 

 t Origin of nostril above posterior nostril or above space 

 between nostrils ; a line connecting base of first ray anfl 

 posterior nostril, if continued, crosses the maxillary. 

 * .\laxillary not reaching middle of eye, 2 .J to nearly 3 in 

 head ; head 3I to 3I in length ; 11 to 13 gill-r.ikers 

 on lower part of anterior arch. 

 § 58 scales in lateral line ; eye 3!, maxillarj' 2 J in head ; 

 body w-ith conspicuous darker rings more or less 

 regularly arranged . . . .12. iiatale}ists. 



§§ 65 or more scales in lateral line ; eye 4 or more, 



maxillary 2 J to nearly 3 in head ; body without 



rings, but with 3 or 4 ocelli . . 13, micrognaihus. 



JJ Maxillary extending to below middle of eye or beyond, 



2 to 2J in head; head 3 J to 35 in length ; (15) 17 or 18 



gill-rakers on lower part of anterior arch 



14. prutnpkthdlwus. 



