ARCTIC ORDOVICIAN AND SILURIAN CEPHALOPODS 253 
During the summer of 1898 Dr. Holtedahl spent five weeks 
on Bear Island. The results of his investigations were embodied 
in his paper ‘ ^ On the Paleozoic Series of Bear Island, Especially, 
on the Heclahook System/^ forming part II of volume. V of the 
Norsk Geologisk Tidsskrift. In this paper he adds Maclurites 
sp. and Gonioceras nathorsti Holtedahl (Holtedahl, Plate XIV, 
fig.) to his former list of fossils from the Tetradium limestone of 
Bear Island, figuring both species. In addition he figures a 
vertical section of an Actinoceroid identified as Actinoceras 
higsbyi Bronn (=A. tenuifilum Hall?) (Holtedahl, Plate XIII, 
fig. 5) ; the latter is refigured in the present paper and the term 
Actinoceras tenuifilum ursinum is proposed for it in allusion to 
its occurrence on Bear Island. Moreover, for the species figured 
in the preceding paper as Orthoceras (Kionoceras?) sp. (Holtedahl 
Plate XI, fig. 2), the name Kionoceras holtedahli also is proposed 
here. 
However, the chief new feature of the second paper by Dr. 
Holtedahl on the Geology of Bear Island is the proof which it 
brings of the presence of Capadian strata on that island. These 
species occur in the younger dolomite series of the Heclahook 
System, beneath the Tetradium limestone horizons. The follow- 
ing forms are listed: Calathium cf. pannosum BiWings, Calathium 
sp., Archaeoscyphia {minganensis Billings?) sp., Crinoid stems, 
Maclurites sp., Liospira sp., Lophospira sp., Orthoceras sp., 
Cyrtoceraconic shell, and Piloceras cf. explanator Whitfield 
(Holtedahl, Plate XII, fig. 6; see also Plate XIII, fig. 3). The 
significant genera of this list are Calathium, Archaeoscyphia^ 
and Piloceras-, which Dr. Holtedahl recognized not only as 
characteristic of the Canadian but as having their main distribu- 
tion in Newfoundland and in Eastern Canada. 
In the present paper the species listed by Dr. Holtedahl as 
Orthoceras sp. Holtedahl (Plate. XIII, fig. 1), is refigured as 
Protocy cheer as cf. lamarcki (Billings), and the Cyrtoceraconic 
shell of uncertain genus (Holtedahl Plate XIII, fig. 2) is refigured 
under Deltoceras (?) sp., to indicate its Nautiloid character and 
not because its genus is definitely known. 
