51 
Of the other species, 7 go no farther than the Miocene epoch, and are 
distributed in the following manner, — 
Bordeaux and Dax . t .3 
ib. ib. and Baden . . 1 
ib. ib. and Touraine . . 1 
ib. ib. and Angers . . 1 
ib. ib. Touraine and Angers . 1 
7 
Total number of species in the three periods, — 
In the Pliocene . . 777 
In the Miocene . .1021 
In the Eocene . . 1238 
3036 
From the above lists it will appear that there are 17 species which are 
common to the three epochs, and which may therefore be said to cha- 
racterise the entire tertiary formations of Europe. Thirteen of them are 
species still living, while four are only known as fossil. There is not a 
single species common to the Pliocene and Eocene epochs which is not 
also found in the Miocene. 
Geographical Distribution of the living Species which 
have their fossil analogues. 
Pliocene Epoch, 350 species. 
In the Mediterranean . 
In the Indian Ocean .... 
At Senegal ..... 
Common to the Mediterranean and Senegal 
and the African Ocean 
Indian Ocean and to Senegal 
• and to America 
In the Northern European Ocean 
■ Pacific Ocean 
242 
25 
5 
14 
8 
7 
5 
Fossil in 
Sicily 
and Italy; 
43 i Fossil in 
1 j the Crag. 
350 
Miocene Epoch, 176 species, (100 species common to the 
preceding epoch.) 
Species. 
At Senegal, of which 13 are common to the Indian Ocean, and 12 
to the Mediterranean . . . . .79 
In the Mediterranean and Southern European Ocean, of which 10 
are common to the Indian Ocean, and 12 to Senegal . 86 
In the Indian Ocean, 10 of which are common to the Southern 
European Ocean . . . . . .29 
Carried over 
194 
(I 2 
