PALAEOLITHIC INDUSTRIES, CLACTON AND DOVERCOURT. 7
Fig 1, 2, is the typical pointed implement of the Grays Inn
group. It shows superior technique, but the side edges are not
infrequently hackled to secure symmetry of outline. Fig. 1. 3
is the "limande" of the same date, which is elliptical rather
than oval in outline. This group is the original "Chellian" ;
it was (and still is) the industry of the type station of Chelles ; it
remained "Chellian" in the 1915 edition of Ancient Hunters,
and in other books to a much later date, but with the transfer-
ence of the name "Chellian" to the former "Strepyan," the
earlier and later stages of the Grays Inn group have now become
"Acheulian" and "Acheulian II."
I hope I make this clear : the Chelles industry (=the Grays
Inn group) is no longer "Chellian." but a re-constituted
"Acheulian" ; the present "Chellian" is the former "Pre-
Chellian" or "Strepyan" ; while the dates at which different
authors made this big change-over are not uniform.
For myself I would prefer to continue to use the old names
in their previously established meaning, but as that is now
impossible, I feel so reluctant to transpose the old names that I
have adopted a descriptive method.
Fig. 1,4, is an ideal representation of an extreme Dovercourt
form ; the heavier line down the middle shows the division
between the facets struck from either side ; the finish being
mainly left-handed. The Dovercourt industry will be discussed
later.
Fig. 1,5, is the smooth-surfaced, thin and keen-edged twisted
ovate, which characterizes an important Palaeolithic horizon.
This is an extreme example of the asymmetric right-handed
finish which produces the peculiar twist of the side-edges.
Fig. 1, 6 is an advanced form of pointed "Boucher," with
incurved side-edges, associated with the twisted-ovates. One
of the finest industries in this country belonging to this horizon
is that of Broom in Somerset. This industry was known for
many years as the "Acheulian" ; it subsequently became
"Acheulian II" (now transferred to the industry that was
formerly the "Late Chellian"), and is now for the time being
"Acheulian IV.-VI," "Acheulian VII" being the Micoque
stage.
Fig. 1,7, is a Clactonian side-chopper ; see page 20.
Fig. 1, 8, is the late triangular form of "Boucher," associ-