A Guide to the Study of Fishes, Volume 1 (of 2)
CHAPTER XXIX.
THE CLASS ELASMOBRANCHII, OR SHARK-LIKE FISHES.
The Sharks.--Characters of Elasmobranchs.--Classification of Elasmobranchs.--Subclasses of Elasmobranchs.--The Selachii.--Hasse's Classification of Elasmobranchs.--Other Classifications of Elasmobranchs.--Primitive Sharks.--Order Pleuropterygii.--Order Acanthodii.--Dean on Acanthodii.--Order Ichthyotomi. 506