1. PSETTODES. 401 



Tlie dorsal commences above the eye ; teeth 



minute 18. Parophrys, p. 454. 



The dorsal commences on the snout ; teeth 



minute; lateral line with a strong curve. 19. Psammodiscus, p. 457. 



The dorsal commences on tlie foremost part 

 of the snout ; two ventrals ; teeth villi- 

 form, forming bands 20. Am.motuetis, p. 458. 



The dorsal commences on the foremost part 



of the snout; one ventral only 21. Rhombosolea, p. 458. 



The dorsal commences on the foremost part 

 of the snout ; two ventrals ; teeth minute, 

 in two series 22. Peltorhamphus, p. 460. 



B. The eyes are developed and on the right side, the upper in advance of the 



lower ; body scaly ; pectorals sometimes rudimentary or absent. 

 * Vertical fins not confluent. 



Scales small, ctenoid 23. Solea, p. 4G2. 



Scales not ciliated ; dprsal and anal rays 

 scaly 24. Pardacuikus, p, 478. 



Scales not ciliated; dorsal and arnl rays 



naked 25. Liaciiirus, p. 479. 



** Vertical fins confluent. 



Scales ctenoid 26. Synaptusa, p. 480. 



Scales not ciliated 27. J^Isopia, p. 4^7. 



C. The eyes are developed and on the right side, the lower not in advance of 



the upper ; body scaleless. 



Caudal free 28; Gymnaciiihus, p. 488. 



D. Eyes rudimentary. 



Vertical fins not confluent 29. Soleotalpa, p. 489. 



Vertical fins confluent 30. Apionichthys, p. 489. 



E. Eyes on the left side ; pectorals none. 



One lateral line 31 . Am.mopleurops, p. 490. 



Lateral line none 32. Aphoristia, p. 490. 



Lateral line double or triple on the left 



side ; lips with tentacles 33. Plagusia, p. 491. 



Lateral line double or triple on the left 



side ; lips not fringed 34. Cynoglossus, p. 492. 



1. PSETTODES* 



Hippoglossus, sp., And. 



Psettodes, Benn. Prac. Connn. Zool. Soc. i. 1831, p. 147. 



Mouth very wide, the length of the maxillary being more than 

 one-half of that of the head. Each jaw armed with two series of 

 long, slender, curved, distant teeth, the front teeth of the inner series 

 of the lower jaw being the long-est, and received in a groove before 

 the vomer ; vomerine and palatine teeth. The dorsal fin commences 



* 1 . Hippoglossus goniographicus, Ripkards. Ichtk. Chin. p. 279. — China. 

 VOL. IV. 2 x> 



