2hb Dr. Daubeny en ihe Geology of Sicily. 
common, as it would appear, both to the chalk and the first 
tertia ..uestone,* nummulites and melanites are also fre- 
quent, 
It is, however, to the country intervening between Sortino 
and ey that I would refer for the most aoa proofs 
of the real age of this formation, as we there see beds 
hounding i in shells, which, if not confined to the saat recent 
class of rocks, seem, nevertheless, in this instance, by their 
concurrence as well as frequency, to indicate the recent date 
of the beds which contain them. Among these, the cerithium, — 
turritella, venus, and venericardia may be mentioned as fre- 
quent; and near ee oe strombi, pectines, casts of 
treehi, and nerite, also 
[may add, that fossil fish Have been found near Syracuse, as ood 
In the rocks of a similar epoch at Monte Bolca near Vicenza. 
With regard to the volcanic rocks with which these beds 
semivitreous aspect of many of them is such as to preclude 
any class of geologists from entertaining doubts with respect 
to the manner of their formation ;f the characters of other 
portions present Part Fa he See to rocks ‘of the trap neti 
which, whatever may be their origin, must have a much o 
te assi ign ned to them. — 
~ In some of the beds, for instance, there is a uniform com- 
tness, he a lithoide fracture, which seems to indicate the 
presence of a certain degree of pressure ; in others we may 
observe the presence of olivine, either disseminate in minute 
crystals through the mass, as in basalt, or assembled in 
nésts. r.. 
The cavities are also frequently filled up hie oleae? a - 
spar or with zeolites, just like the amygdaloids of more 
cient strata; and in some of the beds a eniletiege toa stot. 
nar arrangement is discernible. 
be According to Dr. Boué’s arrangement of Fossil Organic Remains, 
the number of the Edinburgh Philosophical Journal for Jan- 
nary and April 1825, it appears that the Hippuritis rotula and H.e 
atus of Sch ogee 
wh est of Lentini, the volcanic rock has a superficial 
A ae of obsidian, ero it has internally a lithoide basaltic aspect, 
of the vein in the island of Lamlash, pee to Asis the 
sides of which are of pitchstone, whitst the centre is basalts 
