Dr Carpenter's 'Introduction to
the Study of the Foraminifera' should also be consulted.
[Footnote 10: In this and in all subsequently following
bibliographical lists, not only is the selection of works and
memoirs quoted necessarily extremely limited; but only such have,
as a general rule, been chosen for mention as are easily accessible
to students who are in the position of being able to refer to a good
library. Exceptions, however, are occasionally made to this rule,
in favour of memoirs or works of special historical interest. It
is also unnecessary to add that it has not been thought requisite
to insert in these lists the well-known handbooks of geological
and palaeontological science; except in such instances as where
they contain special information on special points.]
CHAPTER VIII.
THE CAMBRIAN PERIOD.
The traces of life in the Laurentian period, as we have seen,
are but scanty; but the _Cambrian Rocks_--so called from their
occurrence in North Wales and its borders ("Cambria ")--have
yielded numerous remains of animals and some dubious plants.
The Cambrian deposits have thus a special interest as being the
oldest rocks in which occur any number of well-preserved and
unquestionable organisms. We have here the remains of the first
_fauna_, or assemblage of animals, of which we have at present
knowledge.
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