1. PSETTODES. 401 



The dorsal commences above the eye ; teetli 



minute 18. Parophrys, p. 454. 



The dorsal commences on the snout ; teetli 



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



The dorsal commences on the foremost part 

 of the snout; two ventrals ; teetli villi- 

 form, forming bands 20. Ammotretis, p. 458. 



The dorsal commences on the foremost part 



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



The dorsal commences on the foremost part 

 of the snout ; two ventrals ; teeth minute, 

 in two series ... 22. Peltoriiamphus, 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. 462. 



Scales not ciliated ; dorsal and anal rays 



scaly 24. Pardachiri's, p. 478. 



Scales not cUiated ; dorsal and anal rays 



naked 25. Liachiuus, p. 479. 



** Vertical fins confluent. 



Scales ctenoid 26. Synaptura, p. 480. 



Scales not ciliated 27. jEsopia, p. 487. 



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



the upper ; body scaleless. 



Caudal free 28. Gymnachirus, p. 488. 



D. Eyes rudimentary. 



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



Vertical fins confluent 30. Apionichth vs. p. 489. 



E. Eyes on the left side ; pectorals none. 



One lateral Une 31. Ammopleurops, 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. Cvxoglossus, p. 492. 



1. PSETTODES*. 



Hippoglossus, sp., Auct. 



Psettodes, Benn. Prcc. Comm. Zool. Soc. i. 1831, p. 147. 



Mouth Tery 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 scries 

 of the lower jaw being the longest, and received in a groove before 

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



* I. Hippoglossus goniographicus, Richards. Ichth. Chin. p. 279. — China. 

 VOL. IV. 2 D 



