I'm reading the new Journal of Vertebrate Paleontology, and have so far made my way through three articles on fossil sharks: "Exceptional preservation of the white shark Carcharodon (Lamniformes, Lamnidae) from the early Pliocene of Peru"; "The spine-brush complex in symmoriiform sharks (Chondrichthyes; Symmoriiformes), with comments on dorsal fin modularity"; and "Pectoral anatomy of Tribodus limae (Elasmobranchii: Hybodontiformes) from the Lower Cretaceous of northeastern Brazil.".    From Wordnik.com.  ["I burned his body for incurring my wrath."] Reference

Sharks, ray, and guitarfish all belong to the subclass Elasmobranchii within the cartilaginous fish class Chondrichthyes.    From Wordnik.com.  [Museum Blogs] Reference

While I’m not aware of any study that has been carried out that points to the prevalence of malformation of the eye in sharks, based upon what we know about mammals, it is indeed possible that such a condition exists among Chondrichthyes.    From Wordnik.com.  [OK, Egnor, it's time to put up or shut up. - The Panda's Thumb] Reference

Class - Chondrichthyes (cartilaginous "fishes").    From Wordnik.com.  [Barking Moonbat Early Warning System] Reference