49 
No. of 
Species 
Brought over .... 256 
Common to Bordeaux, Dax, Touraine, Turin, Vienna, Angers & Baden 1 
ib. ib. ib. Angers and Baden . . 2 
ib. ib. Vienna and Baden ... 4 
263 
By adding to the above 134 species which are common to the 
Miocene, and the two other epochs . . . . 134 
the total number of analogues will be found to be . . 397 
By subtracting from the total number of species of the above 
localities ........ 1418 
those species which are common to different localities , . 397 
We find the real number of species of this epoch to be . 1021 
The number of living analogues is 176, which is in the proportion of 
rather less than 18 in 100 ; the number of fossil analogues, after sub- 
tracting- those which pass from the Miocene into both the Pliocene and 
Eocene epochs, is 168, which is very nearly in the same proportion. 
The species which pass from the Miocene into the Pliocene period are 
in number 196, of which 114 are living, and 82 fossil, which is very 
nearly in the proportion of 20 in 100 of the total number of species of 
the latter epoch. Thus it is remarkable that there are 18 in 100 living 
analogues, 18 in 100 of analogous fossil species, and that 20 in 100 of 
these species pass from the Miocene to the Pliocene epoch. 
The 114 living species, and the 82 fossil ones, which are common to 
the Miocene and Pliocene periods, are distributed, in the last-mentioned 
epoch, in the following manner : — 
Living. 
Fossil. 
Crag 
4 
Crag 
4 
Italy 
4* 48- 
Sicily 
1 
Sicily 
5 
Italy 
71 
Sicily and Italy 
46 
Sicily and Italy . 
5 
Sicily, Italy, and the 
Crag 1 1 
Sicily and the Crag 
1 
114 
82 
The preceding distribution of species will show that Italy is repre- 
sented in the Miocene period by 1S1 species, Sicily by 69, and the Crag 
by 20. 
EOCENE PERIOD. 
Paris, London, Valognes, Belgium, Castelgomberto, and Pauliae. 
A small number of species only have been examined from Belgium, 
Pauliae, and Castelgomberto, but which agreed, with few exceptions, 
with species of the Paris basin. So also in regard to Valognes. 
vol. in. cl 
