ve become peculiarly Italian industries, centring largely in
Naples, Rome and Genoa. On the Algerian coast, however, boats not flying
the French flag have to pay heavy dues for the right to fish, and in the
early years of the 20th century the once flourishing fisheries at La
Calle were almost entirely neglected. Two classes of boats engage in the
pursuit--a large size of from 12 to 14 tons, manned by ten or twelve
hands, and a small size of 3 or 4 tons, with a crew of five or six. The
large boats, dredging from March to October, collect from 650 to 850
[lb] of coral, and the small, working throughout the year, collect from
390 to 500 [lb]. The Algerian reefs are divided into ten portions, of
which only one is fished annually--ten years being considered sufficient
for the proper growth of the coral.

The range of value of the various qualities of coral, according to
colour and size, is exceedingly wide, and notwithstanding the steady
Oriental demand its price is considerably affected by the fluctuations
of fashion. While the price of the finest tints of rose pink may range
from L80 to L120 per oz., ordinary red-coloured small pieces sell for
about L2 per oz., and the small fragments called _collette_, used for
children's necklaces, cost about 5s. per oz. In China large spheres of
good coloured coral command high prices, being in great requisition for
the button of office worn by the mandarins. It also finds a ready market
throughout India and in Central Asia; and with the negroes of Central
Africa and of America it is a favourite ornamental substance.

CORALLIAN (Fr. _Corallien_), in geology, the name of one of the
divisions of the Jurassic rocks. The rocks forming this division are
mainly calcareous grits with oolites, and rubbly coral rock--often
called "Coral Rag"; ferruginous beds are fairly common, and occasionally
there are beds of clay. In England the Corallian strata are usually
divided into an upper series, characterized by the ammonite
_Perisphinctes plicatilis_, and a lower series with _Aspidoceras
perarmatus_ as the zonal fossil. When well developed these beds are seen
to lie above the Oxford Clay and below the Kimeridge Clay; but it will
save a good deal of confusion if it is recognized that the Corallian
rocks of England are nothing more than a variable, local lithological
phase of the two clays which come respectively above and below them.
This caution is particularly necessary when any attempt is be