REPORT ON GEOLOGY. 
303 
concerning the basin of the Po, the Genoese and other northern 
portions; but we still require a good description of the great 
chain of the Apennines, the labours of Sari being hitherto con¬ 
fined to its Tuscan extremity; a general geological map of the 
North is now in preparation, but it does not extend to the South 
of Tuscany ; we can only cite the memoir of Dr. Capello on the 
district of Accumoli in Abruzzo Ulteriore for a single point of 
the central portion of the Apennines, and that of Giovene on 
the Apulias for the southern extremity. 
With regard to Greece we of course possess only the general 
indications of hasty travellers; among these however Boblaye 
deserves particular mention. Boue has conferred a benefit on 
the science in collecting the substance of their scattered re¬ 
marks, connected by his own examinations of the specimens 
from that country, to be found in many Museums, into a well- 
digested Resume, (Zeitsclirift fur Mineral. 1828); he has in¬ 
cluded Asia Minor in the same essay. 
Of the Mediterranean Islands, the Balearic group has been 
described by Elie de Beaumont. There does not appear to have 
been any recent publication on the geology of Corsica and Sar¬ 
dinia. With relation to Sicily, the map and memoirs of Daubeny 
and the observations of Lyell and Christie appear the most im¬ 
portant. 
Of the Mediterranean districts of the opposite continent of 
Africa, we have obtained far more information than the circum¬ 
stances of the case would have authorized our expecting. The 
journals of our own travellers Lyon and Denham are far from 
destitute of interesting notices on this subject; but much more 
important are the contributions of Rozieres to the great French 
description of Egypt; the travels of Caillaud, who penetrated 
up the Nile to Meroe and the White River; and those of Hem- 
prich and Ehrenberg from Libya into Arabia are still more ex¬ 
tensive ; and the latter (Naturgeschichtliche Reisen durcli Nord 
Africa, &c. 1828,) especially valuable from the precision of its 
statements *. 
In Asia, the Russian Government has zealously promoted the 
* It hence appears that the platform of the Libyan desert between the Kata- 
bathmi and Siwab is tertiary, including shelly lime, clay and gypsum ; the banks 
of the Nile from Cairo ascending to Siout or Lycopolis present nummulitic lime, 
possibly cretaceous; from Siout to Esne (Latopolis) oolites prevail; above Syene 
everything is primitive. Proceeding from Cairo to Suez, after leaving the num- 
mulite lime, we observe red sandstone: dolomitic limestone occurs on the West 
shore of the Gulf of Suez, through which porphyritic masses emerge ; the East¬ 
ern coast of the gulf is principally occupied by tertiary lime, but the red sand¬ 
stone reappears at the foot of the porphyritic group of Sinai. The fossils of the 
various formations are fully described by the several authors. 
