Subject ASC0003idi
The geologist : a popular monthly magazine of geology.
v.6 (1863), (1863)
American Museum of Natural History Library
BHL Page 47677635
Keywords
Ptychodontid sharks Ptychodus Polygyrus Agassiz From the White Chalk of Kent In the collection of N. T. Wetherell Esq. of Highgate geology fossil oral (biting surface) of a teeth micro-structure Kent private collection chalk drawing printed drawing Ptychodus polygyrus agassiz white kent mackie collection wetherell highgate Hybodontiforme shark