I.J FLATFISHES (HKTEROSOMATAi 



111. I'elvics more or less subequal, that of ocular side median. 



A, Lateral line without distinct curve anteriorly. 



I. Teeth biserial above, uniserial below : anterior teeth of upper jaw 

 enlarged ; gill -rakers short or of moderate length ; interorbital 

 space more or less broad in male . . . . 12, Sv.mhim. 



J. Teeth uniserial in both jaws. 



a. Mouth of moderate size or rather large, maxillary 1} to j} m 



head; jaws and dentition about equally developed on both sides; 



teeth somewhat enlarged anteriorly. 

 ,1. Gill-rakers short, stout . . . 13 Cvclopsetta. 



p. Gill-rakers of moderate length, slender . 14. Citharichthvs 



b. Mouth small, maxillary 3! to 4! m head ; jaws of blind side 



curved, much more strongly toothed than those of ocular side ; 



none of the teeth enlarged ..... 15. Ktkoi'us. 



B, Lateral line with distinct curve above pectoral 



1. Posterior nostril of bhnd side a small opening, without membranous 



valve ; scales rather small ; lateral line feebly developed or absent 

 on blind side ; rays of dorsal and anal simple, scaled. 



a. Pectoral of blind side well developed. 



u. Jaws and dentition about equally developed on both sides ; 

 rays of pelvic of blind side prolonged ; pectoral of ocular side 

 smaller than that of blind side ; gill-rakers rather long, 

 slender ....... 16. TRiCHOPSErrA. 



l-j. Dentition nearly entirely confined to blind side of jaws ; 

 pelvic of blind side without elongate rays ; pectoral of ocular 

 side larger than that of blind side ; gill-rakers very short 



17. Engyophrvs. 



b. Pectoral of blind side rudimentary, shorter than eye ; second 



rays of dorsal prolonged .... 18. Pkrissias. 



c. No pectoral on blind side (in adult) ; none of the rays of dorsal 



prolonged ....... ly. Monoi.kne. 



2. Posterior nostril a large opening, covered by a membranous valve ; 



scales large ; lateral line well-developed on both sides of body ; rays 

 of dorsal and anal branched, not scaled. 

 a. Teeth uniserial (except anteriorly in upper jaw), with distinct 

 canines ; vomer with teeth ; ongin of dorsal behind lower part of 

 posterior nostril ; tubules of lateral line simple . 20. Eucitharus. 



/'. Teeth in bands (at least in adults) ; no distinct canines ; vomer 

 toothless ; origin of dorsal above posterior nostril ; tubules of 

 lateral line forked ..... 21. Citharoides, 



Genus i. TEPHKINECTES 



leplmtis (MOii Latreille, 1.S04), Gunther, 1X6;, tat. I'lsli., iv, p. 40b [/'/<-iiiuiht/, 1 wiuiiwi, l.ac cpc JeJ. 

 iephrinecUs. Gunther, 1862, Ann. .\Iag. Nat. Hist., (3) x. p. 475 [Plcurmccle^ uncnf-n, LacepL-df] ; 



\Vu, 1032, Thcs. Faciilt. Sci. Univ. I'.iris, A. 244 (jdS), p. 75. 

 \difracta, Jordan. i;,<7. I'ruc. U.S. Xat. .Mus., xxxii, p. 230 [PU-uroncclf. ^memis, l.acop.-dc;. 



Body oblong, compressed. Eyes normally on the left side, separated by a ven,- 

 narrow, naked concave space, dlfactory lamina? rather numerous, arranged trans- 

 versely to a long central rachis. Mouth of moderate size, the length of the maxillary 

 more than \ that of head ; jaws and dentition about equally developed on both 

 sides ; bands of small conical teeth in both jaws ; vomer toothless. Gill-rakers 

 short, broad, with spinate margins ; lower pharyngeals each with several rows of 

 small conical teeth. Dorsal fin commencing well behind posterior no.stril of blind 

 side and above middle of upper eye. its anterior rays much more widely se|iarated 



