PLEURONECTIDiE. — LXXXIX. 165 



hli. Lateral line straightish; scales thin, deciduous. 

 i. Moutli moderate, the maxillary more than ^- head. 



ClTHARICIlTHYS, 232. 



ii. Month very small, the teeth equal, the maxillary not J- head. 



Etkopus, 233. 

 hb. Mouth unsymmetrical, the teeth chiefly on the blind side; V. nearly 

 symmetrical; eyes on right side. {Platessinm.) 

 j. Vertebra} in moderate number (36 to 44); D. 65 to 80; A. 45 to CO. 

 k. Teeth in one row; lateral line not branched. 



/. Lateral line with an arch in front; scales ctenoid. 



LlMANDA, 234. 

 II. Lateralline without arch; teeth incisor-like. 

 m. Scales regularly imbricate, all on eyed side ctenoid, in both 

 sexes; lower pharyngeals very narrow, with slender teeth, 



in two rows Pseudopi^euronectes, 235. 



mm. Scales imperfectly imbricate, rough — ctenoid in cf, smooth- 



ish in 9 ; lower pharyngeals very large, partly united, 



with blunt teeth in 5 or 6 rows. . . . Liopsetta, 236. 



jj. Vertebrae in increased number (58 to 65) ; D. 100 or more ; A. 70 to 



100; teeth broad; left side of skull with large mucous cavities; 



anal spine strong; body elongate, compressed. 



Glyptocefhalus, 237. 

 aa. Soles: edge of preopercle obscured by the scales; mouth very small, 

 strongly twisted towards blind side; teeth rudimentary. 

 n. Eyes on right side, separated by a bony ridge. {Svltinm.) 



0. Gill openings moderate, confluent below; vertical fins separate; 

 right V. confluent with A.; vertebrse 28; body ovate; scales 

 ctenoid, those on head enlarged and fringed; P. minute or 



wanting Achikus, 238. 



nn. Eyes on left side, very small, without distinct ridge between them; 

 scales ctenoid; vertical fins confluent. { Cynoglussinm.) 

 p. V. of eyed side only present, free from A.; no P.; no lateral line; 

 head without fringes Symphukus, 239. 



226. PLATYSOMATICHTHYS Bleeker. (Reinhardtius Gill.) 



(vrXariif, flat ; (raj/xa, body ; Ix^vs, fish.) 



460. P. hippoglossoides (Walbaura). Greenland Halibut. 

 Brown. Head 4 ; depth 3. D. 100. A. 75. L. 4 or more. Cape 



Cod, N. 



227. HIPPOGLOSSUS Cuvier. (Old name from innos, horse ; 



yXwara-a, tongue.) 



461. H. hippoglossus (L.). Halibut. Dark brown; eyes 

 large, widely separated. Head 3|; depth 3. D. 105. A. 78. 

 L. 6 feet or more. In all northern seas, the largest and most val- 

 uable of the flat-fishes, reaching 400 lbs. (Eu.) 



228. HIPPOGLOSSOIDES Gottsche. 



462. H. platessoides (Fabricins). RorCxH Dab. Plain red- 

 dish brown ; eyes large ; teeth uuiserial. Head 3f ; depth 2|. D. 



