File:The Quarterly journal of the Geological Society of London (13205775095).jpg

BABBAGE ON THE TEMPLE OF SEKAPIS,
195
The whole plain called La Starza, which lies between the inland
cliffs and the sea, is of modern formation and consists of beds of
pumice or sand, containing recent marine shells, bones of animals and
fragments of building not rounded by attrition.
Fie. 3.
'-^^ m^sli ^
A Pozzuoli.
B The Bridge of Caligula.
C The Temple of Serapis.
D The Amphitheatre.
E The Arch of Antoninus Pius.
F The Temple of Neptune.
G The Temple of the Nymphs.
H La Starza.
There are also the remains of two Roman roads, at present under
water ; one of these reached from Pozzuoli to the Lucrine lake.
50. Another vestige of the art of a remote period which exhibits
decided evidence of a change of level, is the series of piers placed in
the sea, projecting from the town of Pozzuoli, and known by the name
of the bridge of Caligula,
The general depth of the sea around these piers is from thirty-five
to fifty feet. There are thirteen piers standing, and two others ap-
pear to have been overthrown, as the soundings between the sixth
and seventh piers and between the twelfth and thirteenth prove.
51. At the height of about four feet above the present level of
the sea on the sixth pier* is a line of perforations, apparently by the
Modiola or other boring animal. There are also Serpulse and other
indications of a line of sea-level. I did not find any remains of the
shells, and the holes appeared to have been much worn by water.
The depth round this pier, at very small distances from it, was from
thirty to fifty feet.
52. On the last pier but one there are great numbers of similar
perforations, but I did not discover in them any of the shells: there
are also adhering to the bricks great quantities of Serpulae, and some-
thing which appeared like a Flustra. I think these holes are incon-

• I am not quite certain from my notes whether the pier here described is not