Notices of the Geology and da of Sicily. 203 
fishes, particularly at Syracuse 5 when “sufficiently. hard is 
wrought as marble. The marbles of Sicily geal niapict 
na; the yellow, of pte thes of rie having 
almost every shade of colour; the red, the dendritic, &c. 
of Palermo; the Lumachella, o r snail marble ;_ Pte ‘i 
calcareous Rrétgiak of Catania, Coarse Sh ee 
stone forms a crust over the ial ‘of Sicily, wi f 
_ exceptions already pointed out; all the i slands between 
— and Africa, except the volcanic islet, Partellaria ; 
the co. ‘around Tunis, where it is completely horj- — 
is always stratiform, the strata from many feet 
ew inches in thickness ; i in the centre of the islands, 
“they are horizontal, in Valdemone turned towards the chain 
of Pelorus, and every where ish the coast dipping down- 
wards towards the sea, In the volcanic districts they are 
variously inclined, often alternating with beds of lava as 
Many as sixty times. It is almost entirely made up of shells, 
among which are ammonites, belemnites, gryphites, turbin- 
ites, chamites, &c. and immense quantities of epores 
and other corals. Oolites are abundant, particularly at 
Pedagaggi, near Catania. Calcareous pet Sonne 0 
Masses of shells, barely cemented, are com 
~The bills subordinate to the limestone fasattnns: and the — 
. woines consist of chalk, and calcareous breccias, and beds 0 
marl and clay. The chalk is generally yellow or brown, 
and interspersed with beds of flints and quartz pebbles; 
_ sometimes there are large masses of uncemented shells, of- 
_ ten siliceous and of an enormous Size 5 i ( - ag similar to 
the pre beds of Geo pe) 
ani, and Taormina 
cnyetallied Ca Se honates is found in very fine and perfect 
Specimens, in the @ primitive rocks of Pelorus, and in the 
Cavities and pores of ancient Javas, whether buried or not 
Bis, 
