<Tr> <Th_colspan="2"> Subclasses </Th> </Tr> <Tr> <Td_colspan="2"> <P> Elasmobranchii Holocephali </P> </Td> </Tr> <P> Chondrichthyes (/ kɒnˈdrɪkθiiːz /; from Greek χονδρ - chondr -' cartilage', ἰχθύς ichthys' fish') is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone . The class is divided into two subclasses: Elasmobranchii (sharks, rays, skates, and sawfish) and Holocephali (chimaeras, sometimes called ghost sharks, which are sometimes separated into their own class). </P> <P> Within the infraphylum Gnathostomata, cartilaginous fishes are distinct from all other jawed vertebrates . </P>

Sharks and rays are examples of what kind of fishes
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