DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 427 



III. Month large; teeth Dearly equally developed on both sides of the month. Ventral tin of the left side 



inserted nearly on the ridge of the abdomen. Body sinistral. 



I'm I linn 



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

 foramen; the emargination below the shoulder-girdle near tho isthmus not 

 deep; lateral line with a strong arch in front; last rays of dorsal and anal 

 inserted more or less on the right Bide of the median line: teeth subeqnal in 

 bands. 

 1. Vomer with teeth. 



a. Ventral of eyed side united to tho anal ; scales small, very rough; body ovate. [ZeUGOPTERUS] 



6. Ventral tins free from the anal; scales ciliated, deciduous; body oblong, much compressed. 



Lepidorhombus 



li. Septum of gill cavity below gill arches, without foramen ; a deep emargination nearer the isthmus; 

 ventral tins free from anal. 



1. l'eetoral tin of both sides present; dorsal rays less than 100. 



n. Vomer toothless; ventral tins free from anal: caudal I'm suhsessile. 



i. Lateral line with a distinct arch in front; teeth small, uniserial, or imperfectly biserial. 

 Interorbital area a narrow ridge, sometimes with a median groove, 

 t Scales weakly ciliated or cycloid, deciduous ; vertcbrre 10 + 28 =38; Bupr&maxil- 



laries with a posterior process from the lower angle [AsNOGLOSSUS] 



tt Scales strongly ctenoid, adherent; supraniaxillarios obliquely truncated behind. 



Trichopsetta 



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



body ovate (pectoral of left side usually filamentous in tho male); vertebra) 



11 + 30=39 Platopiikys 



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

 orbital space very narrow, the ridges coalescing between the eyes. 

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

 t (Jill-rakers slender, of moderate length; scales thin, deciduous, ciliated; vertebra) 

 34 to 40. 

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

 eye Citharichthts 



* Mouth very small, the maxillary less than one-third length of head EtropUS 



Hi. Lateral line without arch in front; scales cycloid. Teeth in both jaws uniserial, of 



lower enlarged and largest on sides Cyclopsetta 



2. Pectoral fin of blind side wanting. 

 A. Teeth small, uniserial; mouth moderate. 



1. Lateral line of eyed side arched, that of right side less so or nearly straight. 



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

 numerous ; scales small ; body thin, very elongate Monolene 



LIMANDA, Gottsche. 



Limanda. Gottsche, Wiegmann's Archiv., 1825, 100. — Jordan and Gilbert (as subgenus), Hull, xvi, U.S. 



Nat. Mus.,834. 

 Nemo-tops, (li niiif.h. challenger Report, vi, 57; xxn. Hit! (type, .V. microstoma, loo. tit., vi, 57, pi. xxiv, 



lig. c). 



A group of pleuronectoid fishes closely related to, if not a subdivision of, the genus 

 Ptcuronectes; having ctenoid scales, a lateral line strongly arched in front, and without an 

 accessory branch. 



The type, Plctitonntin limn tula, Linnams (=I4manda vulgaris, Gottsche) is found along 

 the coasts of Europe from Iceland to the Gulf of Gascony. The British fishermen take it 

 on their deep sea lines, and it no doubt descends below the hundred fathom line, especially 

 in Bummer. 



Limanda microstoma, (Giinther), is from the Admiralty Islands, at a depth of 152 

 fathoms. 



LIMANDA FERRUGINEA, (Storfr), Goode and Beam. 



Platessa ferruginea, Stoker, Hist. Fish. Mass. isr>7, p. 198, pi. xxx, fig. 4. 



Myzopsetta ferruginea, Gux, Cat. Pish E. ('oast X. A. 1861, 51 (genus not defined); Proc. Acad. Nat. Bel. 



Phil. 1864, 217 (genus defined i. el alibi. 

 I'lt uioii, it, a ferruginea, GOnther, Cat. Fish. Brit. Mus., iv, 18G2, 447. — Jordan St GILBERT, Bull, xvi, IT. 



S.Nat. Mus, 834. 



