CLASSIFICATION OF FISHES. 49 



Ordo IV. Anacanthini (Miiller). 



Endo-skeleton ossified ; exo-skeleton in some as cycloid, in others as 

 ctenoid scales ; fins supported by flexible or jointed rays ; ventrals 

 beneath the pectorals, or none ; swim-bladder without air-duct. 



Suborder 1. Apodes. 

 Fam. Ophidklce, P^xample, Ophidium. 



Suborder 2. Thohacici. 



Fam. GadidcB, Example, Cod. 



Pleuronectidce, Plaice. 



Ordo V. Acantiiopteri (Miiller). 



Endo-skeleton ossified ; exo-skeleton as ctenoid scales ; fins with 

 one or more of the first rays unjointed or inflexible spines; ventrals 

 in most beneath or in advance of the pectorals ; swim-bladder with- 

 out air-duct. 



Fam. Percidce, Example, Perch, 



Sclerogenidce, Gurnard. 



Scicsnidce, Maigre. 



Labyrinthibranch it, Anabas. 



MugilidcE, Mullet. 



Notacanthidce, Notacanth. 



Scomberidce, Mackerel. 



Squatnipennes, Chtetodon. 



Tcenioidei, Riband-fish. 



TheutijidcB, Acanthurus, or Lancet-fish. 



FistularidiB, Pipe-mouth- and Snipe-fish. 



Gobiid(E, Groby, Remora, and Lumpfish. 



Bletiniidce, Blenny and Wolf-fish. 



Lophiidce, Angler. 



Ordo VI. — Plectognatiii (Cuvier). 



Endo-skeleton partially ossified ; exo-skeleton as ganoid scales or 

 spines ; maxillaries and prc-maxillaries fixed together ; swim-bladder 

 without air-duct. 



Fam. BalistincB, Example, File-fish. 



Ostraciones, Trunk-fish. 



Gymnodontes, Globe-fish. 



VOL. II. E 



