254 



VERTEBRATA: PISCES OR FISHES. 



SELACHIANS. 



GANOIDS. 



Dermopters writing the names so as to show their rela- 

 tions to the eleven Orders here adopted : 



1. PLAGIOSTOMI or Selachii or Elasmobran- ^| 



chii. as the Rays and Sharks. 



2. HOLOCEPHALI or Chimaeroids, as the 



King of Herrings. 



3. PROTOPTERI or Sirenoids or Dipnoi, as the 



Lepidosiren. 



4. GANOIDEI or Ganoids, as the Sturgeons, 



Gar-pikes, etc. 



5. LOPHOBRANCHII or Tuft-gilled Fishes, as 



the Pipe-fishes, Sea-horses, etc. 



6. PLECTOGNATHI or Twisted-jawed Fishes, 



as the Puffers, Trunk-fishes, etc. 



7. ACANTHOPTERI or Spine-finned Fishes, as 



the Anglers, Mackerels, Sculpins, Perch, 

 etc. 



8. ANACANTHINI or Spineless-finned Fishes, }- TELIOSTS. 



as the Flounders, Soles, Halibut, Cod, etc. 



9. PHARYNGOGNATHI or Gar-fishes and their 



allies, as the Conners, Tautog, Flying- 

 fishes, etc. 



10. MALACOPTERI or Soft-finned Fishes, as 



the Pike, Carp, Salmon, Herring, Eels, 

 etc. j 



11. DERMOPTERI (including Marsipobranchii) "I 



or Skin-finned Fishes, as the Lampreys, DERMOPTERS> 

 Myxines or Hags, Lancelot or Amphi- j 

 oxus, etc. 



J 



SUB-SECTION II. 



THE ORDER OF PLAGIOSTOMI OR SELACHII OR RAYS AND 



SHARKS. 



THE fishes of this group are often called Selachii or 

 Selachians, because they have a cartilaginous skeleton, 

 the name Selachian coming from the Greek word selachos, 





