92 



Asteyospondijli. 



Wall-case, '^^^ Scylliidffi Jrange from the later Jurassic upwards. 



No. 3, and 1'hey are represented in the Bavarian Lithographic Stone by 

 No^^27^^^' P^i'l^oscyll'mm, in the Upper Chalk of Mount Lebanon by 



Wall-case, 

 No. 3, and 

 Table-cases, 

 Ncs 26 and 

 27. 



KiG. 125. — Teeth of Coddiodo.s contortux, Ag. ; Carboniferous Limestone, Armagh. 



Mesiteia, and in the Englisli Chalk by i'autinscijllmm. Teeth 

 of the existing Glnglymotitiinia are exhibited from the Eocene. 



The Lamnidse and Carcliariida? are the characteristic sharks 

 of modern times, but are very rarely found fossil except in the 

 form of detached teeth, vertebraa, and portions of calcified carti- 

 lage. To the Lamnida^ wiay be assigned the fine examples of 

 Scapanorhiptchiis from the Upper Cretaceous of Mount Lebanon, 

 which exhibit a dentition identical with that of Odoifaspis, but 

 differ in the remarkable elongation of the snout and in the 

 arrangement of the fins. To the Carchariidse belong several 

 tine fishes from the Upper Eocene of Monte Bolca, near Verona, 

 of virhich there are no specimens in the Collection. A large 

 series of detached teeth is exhibited, but it is impossible to name 

 and arrange them satisfactorily, owing to the variation of shape 

 always occurring in one and the same mouth. Lamna (including 

 Ofodus, in part) and O.ryrhiiia seem to range from the Cretaceous, 



Fig. 120. 



Fig. 127. 



Fig, r.'6.— Tooth of OiioiiUispix tUi/iuis, 

 Agassiz ; London Clay. 



Via. ]'27. — Tootll oi Car'-harodiid iMiialodod, 

 Agassiz ; Suflolk Crag. (One-third nat. size.) 



while Corax is the tooth of an extinct member of the Lamnida3 

 of the same age. Odontaspis (Eig. 120) is Tertiary and Recent. 

 The Jurassic Orthacodus may even belong to this family. The 

 teeth of Carcharodon, how^ever, are the most interesting of such 



