UTRECHT MICROPALEONTOLOGICAL BUllETINS

norvegicum and Bryograptus kjeruifi. According to the data given by the
International Stratigraphical Lexicon, 1956, vol. I, fasc.3a IV, Hede's
(1951) Zone of Adelograptus hunnebergensis is correlative with part of the
British Zone of Bryograptus (fig. 19).
At Kopingsklint the Drepanoistodus acuminatus Zone and the Drepanoistodus
numarcuatus/Paroistodus amoenus Zone together cover member
Dk 1, which is the "Ceratopyge shale" or the Zone of Shumardia according
to Tjernvik (1956) (see figs. 16 and 19). Near Horns Udde, in section 14, the
Drepanoistodus numarcuatus/Paroistodus amoenus Zone coincides with
Tjernvik's "Ceratopyge shale" and thus with his Zone of Shumardia as well
(fig. 18). According to Tjernvik (1956) the Zone of Shumardia is equivalent
to the Swedish Zone of Cionograptus heres. According to the data given by
the International Stratigraphical Lexicon, 1956, vol. I, fasc. 3a IV, the Zone
of Shumardia might be equivalent to part of the British Zone of Bryograptus
(fig. 19).
The Drepanodus arcuatus Zone in member Kk 1 at Kopingsklint would be
equivalent to the Zone of Apatokephalus serratus (fig. 16), which is considered
by Tjernvik (1956, p. 177) to be the uppermost part of the Tremadocian
in Sweden. The Zone of Apatokephalus serratus could not be correlated
with the graptolite-zonations.
Neither the Drepanodus arcuatus Zone, nor the Prioniodus deitatus Zone
in member Kk2 near Horns Udde (see locality 2, fig. 5) can be correlated
with Tjernvik's (1956) zonation, as this rock-sequence was not studied by
that author.
The Drepanoistodus inconstans Zone and the Triangulodus subtilis/
Gothodus microdentatus Zone together cover the main part of member Kk2
at Kopingsklint and thus correspond to Tjernvik's Zone of Plesiomegalaspis
armata (fig. 16). Elsewhere in Sweden the limestones with the Piesiomega-
Iaspis armata Zone were found together with shales, from which Tjernvik
collected a graptolite fauna, possibly correlative with the British Zone of
Dichograptus, which is at the base of the Ordovician Arenig Series (fig. 19).
Between Aleklinta and Djupvik, the Prioniodus elegans/Oelandodus
eiongatus Zone, the Stolodus stoIa Zone, the Protopanderodus rectus/
Oelandodus costatus Zone, the Protopanderodus rectus/Oepikodus evae
Zone and the Oistodus lanceolatus/Prioniodus deltatus Zone together seem
to correspond to Tjernvik's Zone of Plesiomegalaspis planilimbata (fig. 17).
At Kopingsklint the Protopanderodus rectus/Oepikodus evae Zone is the
only one of the Aleklinta suite that is present. It forms here part of
Tjernvik's Zone of Plesiomegalaspis planilimbata also (fig. 16). The Protopanderodus
rectus/Oepikodus evae Zone from the upper portion of member