Norwich Castle Museum I te) 
Lily” of the Lias, called Extracrinus briareus, from 
the number of its arms. Many of the reptiles of this 
period were winged and known as Pterodactyles, from 
pleron, a wing, and dactylos, a finger. Remains of 
small specimens of these creatures are in the collec- 
tion. ‘They had a bird-like head, with reptilian teeth, 
fore feet to which the wings were attached but not 
adapted for walking, and hind legs. ‘There is a large 
series of vertebral bones of the monster saurians of 
this period. 
Turn to Table Case 3, and there will be seen 
vegetable remains, chiefly ferns, from the Lower 
Oolite, and a number of Mollusca, including the 
Terebratula or Lamp Shell, which originated in the 
Primary period, and has continued to the present 
day; and Modiola, a kind of mussel, as well as 
Apiocrinus, a form of the family of the Stone Lily, 
which was very abundant in the Carboniferous Seas. 
The Inferior and Great Oolites, Cornbrash, Oxford 
Clay, Coral Rag, and Portland beds are members of 
the Oolite. Among the specimens from these forma- 
tions will be found Gryphea, Pecten, Cidaris, Trigonia, 
Ammonites, teeth of fishes, etc. The Coral Rag is 
very rich in corals. From the Portland Stone are 
examples of shells, including AZya, Pinna, Buccinum, 
and Zurritella. Ammonites, some of them of great 
size, constitute a striking feature of the Oolite forma- 
tion, and some of those from the Portland beds are 
very large, as is shown by the specimen in the Wall 
Case 6. The living ally of the Ammonite is the 
Nautilus, the Ammonite differing from it in the 
folding of its septa or chambers. 
The Cretaceous series of the Secondary Rocks is 
strongly represented. From the Wealden, formed in 
the delta of a great river, are remains of a huge land 
Lizard, the Afegalosuurus, often thirty feet long, and 
