10 ANATOMY OF VERTEBRATES. 



Suborder I. APODES. 



Fam. 1. SymbranchidcB. Ex. Cuchia. 



2. Mur&nidcR. Ex. Eel. 



3. Gymnotidcs. Ex. Gymnotus. 



Suborder II. ABDOMINALES. 



Fam. 1. Heteropygii. Ex. Amblyopsis. 



2. Clapeidce. Ex. Herring. 



3. Salmonidcs. Ex. Salmon. 



4. Scopelid(R. Ex. Saurus. 



5. Characinidce. Ex. Myletes. 



6. Galaxidce. Ex. Galaxias. 



7. Esocidce. Ex. Pike. 



8. MormyridcE. Ex. Mormyrus. 



9. CyprinodontiddB. Ex. Umber. 



10. Cyprinidce. Ex. Carp. 



11. Siluridce. Ex. Sheat-fish. 



12. Alepisauridce. Ex. Marine Sheat-fish. 



Suborder III. PHARYNGOGNATHI. 

 Fam. 1, Scomber-esocidce. Ex. Saury-Pike. 



Order IV. ANACANTHINI. 



Endoskeleton ossified ; exoskeleton in some as cycloid, in others 

 as ctenoid scales ; fins supported by flexible many-jointed rays ; 

 ventrals beneath or in advance of the pectorals, or wanting ; swim- 

 bladder, when present, without a duct. 



Fam. 1. Ophididce. Ex. Ophidium. 



2. Gadidce. Ex. Cod. 



3. Pleuronectidce. Ex. Plaice. 



Order V, ACANTHOPTEKI. 



Endoskeleton ossified ; exoskeleton, in most, 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 ; 

 duct of swim-bladder obliterated. 



