70 GUIDE TO THE FOSSIL REPTILES, AMPHIBIANS, FISHES. 
Wall-ease 
3. 
Table-case 
5. 
Wall-case 
3 . 
Table-case 
6 . 
Cestracion itself ranges from the Upper Jurassic onwards, and 
there is a well-preserved example in Wall-case 3 from the 
Upper Jurassic Lithographic Stone of Bavaria. 
The Scylliidae date from Upper Jurassic times, and there 
are well-preserved specimens of these small dog-fishes from 
Fig. 68.—Dorsal fin-spine of Hybo- Fig. 69.—Teeth of Acrodusanningice, 
dus, from theWealden of Sussex; showing variation in shape, from 
about two-thirds nat. size. (Table- the Lower Lias of Lyme Regis ; 
case 4.) nat. size. (Table-case 5.) 
the Lithographic Stone of Bavaria and the Upper Cretaceous 
of Westphalia and Mount Lebanon in Wall-case 3 and 
Table-case 6. The Lamnidae and Carehariidae are the 
characteristic sharks of modern times, but are rarely found 
fossil except in the form of detached teeth, vertebrae, and 
pieces of cartilage. To the Lamnidae may be assigned the 
fine examples of Sccipanorhynchus from the Upper Cretaceous 
