DISCUSSION OP SPECIES AND THEIR DISTRIBUTION. 427 



III. Moutli large; tieth ucarly equally developed ou both sides of ibe mouth. Ventral fin of the left side 



inserted nearly ou the lidgo of the abdoniou. Body sinistral. 



I'setlinn: 



A. Septum of gill cavity between gill arches and the termination of the sliouldcr-girdle with a large 



foramen; the emarghiatiou below the shoulder-girdle near the isthmus not 

 deep; lateral line with a strong areli in front; la.st rays of dorsal and anal 

 inserted more or less ou the riglit side of tlie median line; teeth subequal in 

 bands. 

 1. Vomer with teeth. 



a. Ventral of eyed side united to the anal ; seales small, very rough; body ovate. [Zeugopterus] 



b. Ventral tins free from tlie anal; scales eiliated, deciduous; body oblong, nuich compressed. 



Lkpidorho.muiis 



B. Septum of gill cavity below gill arche.'!, -without foramen; a, deep eiuargiuatiou nearer the isthmus; 



ventral fins free from anal. 



1. Pectoral fin of both sides present; dorsal rays less than 100. 



a. Vomer toothless ; ventral fins free from anal ; eaud.al fin subsessile. 



i. Lateral line with a distimt arch in front; teeth small, uniserial, or imiierfi-clly l>iscrial. 

 " luterorbital are.a a narrow ridge, sometimes with .a median groove. 



t Scales weakly ciliated or cycloid, deciduous; vertebral 10 + 28=38; suiiramaxil- 



laries with a posterior ]U(>cess from the lower angle [ARNor.LOSst's] 



tt Scabs strongly ctenoid, adherent; supramaxillaries obliquely truncated behind. 



Trichopshtta 



* * luterorbital space more or less broad, deeply concave ; scales small, ctenoid, adherent ; 



body ovate (pectoral of left side usually filamentous in the male) ; vertebrto 



9 + 30 = . 39 PLAT0PHHV8 



a. Lateral line without arch in front; scales ciliated. Teeth in both .jaws uniserial; inter- 

 orbital 8]>ace very narrow, the ridges coalescing between the eyes. 



* Mouth not very small, the maxillary more than one-third length of head. 



t Oill-r.akers slender, of moderate length; scales thin, deciduous, ciliated; vertebrae 

 34 to 40. 

 a. Head much compressed, with the interorbital region flat and level with the 



eye CiTHARiciiTnYs 



•* Mouth very small, the maxillaiy less than one-third length of head Etropi'.s 



in. Lateral line vpithout arch in front; scales cycloid. Teeth in both jaws uniserial, of 

 lower enlarged and largest ou sides C vclopsetta 



2. Pectoral fin of blind side wanting. 

 A. Teeth small, uniserial; ujouth moderate. 



1. Lateral line of eyed side arched, tliat of right side less so or nearly str.aight. 



a. Dorsal fin beginning on snout, its anterior rays not exserted, its rays all simple and very 

 numerous; scales small; body thin, very elongate Monolene 



LIMANDA, Gottsche. 



LimanHa, Gottsche, Wiegmann's An hi v., 1S2.">, 100.— Jordan and Gilbert (as subgenus). Bull, xvi, U.S. 



Nat. Mus., »3i. 

 Nematops, GuNTHER, Challenger Report, vi, 57; xxii, Ititi (type, X. viUrostomn, loc. HI., VI, 57, pi. xxiv, 

 fig. C). 



A group of pleuroiiectoid fishes dosely iclate.l to, if not a subdivision of, (lie i^cmis 

 Pleiironcctcn; having «tenoid scales, a lateral line strongly airlied in front, and witliont an 

 accessory braueli. 



The tyi^e, Pleuroncctes limanda, LinnuMis {=Limnnfla rulgmis, (Jottsche) is found along 

 the coasts of Europe from Iceland to the (Jiilf of (iascony. The I'.iitish ti.shernien take it 

 ou their deep-sea Hues, aud it no doubt descends below the hnndred fiitlioin hue, esiiecially 

 in summer. 



Limanda micro.ifoma, (Giinther), is from the Aduu'ralty Islands, at a deptii of 152 



fathoms. 



LIMANDA FERRUGINEA, (Storer), Goode and Bioan. 



Phdfssa ffrriifiivea, Storer, Hist. Fish. Mass. IStiT, !>. 198, pi. xxx, lig. 1. 



Myzopxeltafnru;,ima, (!iLi., Cat. Fish E. Coast X. A. 1801, 51 (genus m>t defined) : Proc. Acad. Nat. Sci. 



Phil. 18G4, 217 (genus defined), el alibi. 

 Flemoncdes fa-nigine,,, Gunther, Cat. Fish. Brit. Mus., IV, 1802, 447.-JORDAN A Gilbert, Bull, xvi, U. 



S. Niit. Musj 834. 



