W. G. Fearnsides—Lower Ordovician Rocks of Scandinavia. 259 
Dalarne. 
Di. Tornquist. Oversigt ofer Bergbygnaden inom Siljansomradat. 8.G.U., 
ser. C, No. 57, 1883. 
Ostergétland (Berg, Knifvinge, Storberg, etc.). 
Hl. Linnarsson & Tullbere. Kartbladet Vreta Kloster. §.G.U., ser. Aa, 
No. 83 (pp. 17-30), 1882. i 
E2. Wiman. Ett Nytt find af Obolussandsten i Ostergétland. G.F.F.S., 
p. 335, 1903. 
Vestergétland (general). 
Wi. Linnarsson, J. G. O. Om Vestergétlands cambriska och  siluriska 
aflagringar. Kel. Sy. Vet.-Ak. Handl., Bd. viii, No. 2, 1869. 
Vestergétland (Kinnekulle). 
W2. Holm. Kinnekulle, dess geologi och den tekniska anvindningen af dess 
bergarter. §8.G.U., ser. C, No. 172, 1901. 
Vestergotland (Falbyeden). 
W3. Munthe. Kartbladet Skifde. 8.G.U., ser. Aa, No. 121 (pp. 19-47), 
1905. 
W 4. of Kartbladet Falképmg. $.G.U., ser. Aa, No. 120 (pp. 17-33), 
1906. 
W 5. iy Kartbladet Tidaholm. §8.G.U., ser. Aa, No. 125 (pp. 26-52), 
1906. 
Vestergétland (Hunneberg and Halleberg). 
W6. Siedenbladh. Kartbladet Venerborg. 8.G.U., ‘°40”’ (pp. 34-64), 1870. 
Kristiania District. 
K1. Brégger. Die silurischen Etagen 2 und 3. In Kristianiagebiet und auf 
Kker, 1882. i 
K2. Bjorlykke. Geologisk kart med beskrivelse ofer Kristiania by. Norjes 
Geologiske Undersokelse, No. 25, 1898. 
Subsequent workers will also find the recently published papers 
by Wiman on the Dalarne Ceratopyge beds (C), G.F.F., 1906, 
and Von Post on the similar beds of Falbygden useful, while the 
masterly new monograph of the ‘‘ Ceratopyge region”? by Moberg & 
Segerberg, Med fran Lunds Geol. Faltklubb, ser. B, No. 2, 1906, like 
the older monograph of the graptolites of the Phyllo-Tetragraptus 
Skiffer by Tornquist, Lunds Univ. Arskrift (G), 1901 and 1904, is 
quite indispensable to all students of ‘‘ Lower Silurian”’ paleontology. 
The ‘* Ceratopyge region’? monograph contains also a full authors’ 
bibliography of the paleontology of the Scandinavian and some 
equivalent British and foreign beds here discussed, and this it is 
therefore unnecessary here to reproduce.! 
Note.—The following portion of the paper in its present form was read before the 
Geological Society on Feb. 27th, 1907, and is published in abstract in the Proceedings 
of the Geological Society of March 4th, 1907. 
In stating briefly the results of my work I shall consider the 
Tremadoc and Arenig rocks of Scandinavia in the three broad 
divisions— 
C. Didymograptus shales and Orthocerakalk, 
B. Glauconite shales and Ceratopygekalk, 
A. Dictyonema and Bryograptus shales, 
taking them in the order of their superposition. Along with division A 
I shall discuss also the underlying highest zone of Alum Shales (the 
Acerocare zone), into which in all parts of Scandinavia it passes 
continuously. 
* See also note on this monograph in GrontoGican Macazinz, February, 1907, by 
W. G. Fearnsides, p. 85. 
