Australasian Fossils: A Students' Manual of Palaeontology

by Frederick Chapman

Fig. 73—LOWER ORDOVICIAN GRAPTOLITES.

A—Bryograptus clarki, T. S. Hall. L. Ordovician. Lancefield, Vict.
B—Tetragraptus fruticosus, J. Hall sp. L. Ordovician. Lancefield.
C—Phyllograptus typus, J. Hall. L. Ordovician. Lancefield.
D—Goniograptus macer, T. S. Hall. L. Ordovician. Lancefield.
E—Didymograptus caduceus, Salter. L. Ordovician. Lancefield.
F—Trigonograptus wilkinsoni, T. S. Hall. L. Ordov. Darriwill, Vict.

Fig. 74—LOWER ORDOVICIAN GRAPTOLITES.

A—Loganograptus logani, J. Hall sp. L. Ordov. Newham, Vict.
B—Tetragraptus approximatus, Nich. L. Ordovician. Canada and Victoria.

(After Nicholson)

(3) Castlemaine Series. Characterised by Didymograptus bifidus, D. caduceus and Loganograptus logani. Phyllograptus persists from the Bendigo Series. It also contains Tetragraptus serra, T. bryonoides, T. quadribrachiatus, Goniograptus macer and several Didymograpti.