REPTILIA. 
13 
from the Lithographic Stone of Monheim, Bavaria, described Wall-case 
by Sommerring in 1816 as the remains of a gigantic lizard ^ 
(lacerta gigantea ), are exhibited in Wall-case 3. Line a 1 ®‘ case 
examples of Metriorhynchus, obtained from the Oxford Clay 
Pig. 7. —Upper view of skull of a marine Crocodile (Metriorhynchus 
hastifer), from the Kimmeridge Clay of Normandy; one-sixth nat. 
size. fr. frontal; la. lachrymal; mx. maxilla; na. nasal; or. orbit; 
pmx. premaxilla. (Allied species in Wall-case 3.) 
Pig. 8. —Tooth of Dakosaurus maximus, from the Kimmeridge Clay of 
Ely; nat. size. (Table-case 11.) 
of Peterborough by Mr. Alfred Leeds, are also shown in the 
same case. 
Some contemporary crocodiles, such as the slender Steneo- 
saurus and the heavy DaJcosaurus (Fig. 8), are well armoured 
