224 Letters of Mr. Brongniart, with remarks. 
the extent and the nature of the tertiary* formations, anala- 
gous to those in the environs of Paris. I have not only tra- 
ced these formations quite to Rome, but I have fully ascer- 
tained, by conversations with M. Brocchi, that they are 
found also at the extremity of Calabria near Regio. 
“JT have had moreover, a long time, in my collection, 2 
piece of madrepore which came from this region, and 
which led me formerly to suppose, the existence of such 
formations, among those that were so far removed from 
what we had been accustomed to consider as their centre ; 
[have learned from him that they exist under the volcanic 
rocks of Ischia; finally, I saw them near Geneva, at a great 
elevation, in the environs of the small town of St. Remo, 
and on my return at the foot of the southern side of the 
Alpes, from Bassano to the environs of Verona at Rouca, 
olea &e. 1 am occupied in digesting a notice upon the 
analogy of these formations with ours, and I have learned 
with much satisfaction t r. Buckland, who on his return 
from Italy, also saw the same places, observed the same a- 
nalogy, an analogy which holds in almost all the characters, 
and especially in the group (“ensemble”) of fossil shells, 
and other marine bodies, which they contain. 
“Thus a definite position is assigned in the strata of the 
globe, to the celebrated fossil fish of Bolea, that is, in 
tertiary formations in analogy with those in the environs of 
is, and with those of other places. Mr. Beudant has 
j' ra ou yt. £ Zid a Oe gary, and Mr. Prevost. 
‘one of my former pupils, has recently discovered them near 
Baden in the environs of Vienna, in Austria. He has pre- 
pared a memoir on this subject, and will soon read it to the 
Institute. | . 
* But this analogy, so striking and complete, between the 
rocks and the tertiary formations, in countries very remote 
from each other, is not the only one which exists, and whiel: 
has strongly impressed me as well as Mr. Buckland. 
“The greater part and possibly the whole of the rocks 
which compose the crust of our globe, present, in their na- 
ture, in their structure, and in their order of superposition 
_#We presume coinciding generally with the secondary formations of 
+A-cmall Island, scarcely four leagues from Naples. 
