268 Dr. Mac Culloch on the 
been improper to have occupied much space in detailing that 
which is already before the public. It is better to refer the 
reader to the work itself; and to it all will naturally have 
recourse, who may feel interested in the subject, and who are 
at the same time suspicious of the truth of the conclusions which 
I have attempted to draw. . But | must repeat that I have taken 
no liberty with the statements, as far as I have been able to 
apprehend their true nature from consulting both the treatises to 
which I haye referred. 
For the geographical details of the subapennine formation, I 
must inevitably refer to the work itself, as they would both 
occupy too much room, and would also be nearly unintelligible 
without a map. But it must be remarked, in a general way, 
that this deposit, as he has described it, is found, not only in 
many low situations, but forming a range of hills at the foot of 
the Apennine. Occurring thus in various places which I shall 
not enumerate, it is found, among others, in Piedmont, near 
Parma in Placentia, whence it extends all along the north side 
of this ridge to Otranto; while, on the south side, it skirts the 
elevated land in a similar manner, occurring at Orvieto, Rome, 
near Terracina, and elsewhere. I must also remark, that the 
same alluvia are to be seen near Vicenza and Verona, or at 
the foot of the Alps, as well as the Apennines; so that the 
term subapennine has not been very well chosen. 
By putting together Signor Brocchi’s facts, it is indeed easy 
to see that nearly the whole promontory of Italy is more or less 
covered by this interesting and remarkable deposit; that it 
does not necessarily form hills, and that it is deficient, only 
where its deficiencies may be accounted for, either by the waste 
of the superficial parts on the higher ridges of the fundamental 
mountains, and their consequent removal; or else by volcanic 
eruptions and earthquakes; or lastly, by the action of rivers, 
which have either washed it away, or have covered it with 
other alluvia of the usual recent terrestrial origin. It is impor- 
tant here thus to generalize these geographical facts, for which 
the materials have been furnished by the author. 
The general alluvial deposit under review, as given by Signor 
