208 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
JEMTLAND. 
The most recent general account of the Ordovician of Jemtland is 
that given by Wiman (87), to which account must be added certain 
facts obtained later by Moberg (75), Wiman, and Hadding (60). 
The section of Palaeozoic rocks there is given by Wiman as follows: 
Pentamerus kalk. 
? 
Chasmopskalk with Graptolithenschiefer. 
Orthocerenkalk. 
Underer Graptolithenschiefer. 
Ceratopyge kalk? 
Olenidenschiefer. 
Alunschiefer 
| Paradoxidenschiefer. 
Quarzit. 
The so-called Ceratopyge limestone is conglomeratic at the base, 
containing fragments of the Olenus shales. Above it is a limestone 
with much glauconite, and at the top a somewhat pure limestone. 
This limestone contains some fossils, referred by Moberg definitely 
to the Ceratopyge fauna but which seem to indicate fully as much 
affinity with the Planilimbata limestone. Moberg lists, from Tos- 
sasen: — Orthis christianiae, Niobe laeviceps, and a Cyrtometopus. At 
Kl6fsjé he found Niobe insignis and a Megalaspis like M. stenorha- 
chis Ang. The thickness of this limestone is not stated but one would 
infer that it was about one meter. 
This is succeeded by a green and gray graptolite-bearing shale, 
which with the limestone below, make a total thickness of fifteen 
meters. In the shale are lenses and one continuous bed of limestone. 
The shales have afforded Wiman: — 
Pliomera sp. Didymograptus filiformis Thg. 
Megalaspis sp. D. hirundo Salter. 
Leptaena sp. Phyllograptus sp. ind. 
Tetragraptus serra. Tetragraptus quadribrachiatus. 
In the limestone he found: — 
Megalaspis sp. Ampyx sp. 
Niobe laeviceps Dalm. Orthis sp. 
