218 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Below this is the stratum filled with Sphaeronis pomum Gyllenh. 
as at Kinnekulle. 
Lower Asaphus limestone. This j is a gray limestone from which 
Pterygometopus sclerops, Megalaspis heros, Ptychopyge applanata, 
Niobe frontalis, Illaenus esmarki, Ampyx nasutus, Orthis obtusa, and 
Gly ptocystites cf. leuchtenbergi have been reported. Asaphus expansus 
is not found in Oeland. 
Holm (65), has described, from a glauconitic gray limestone at 
Halludden near Béda in northern Oeland, Jsograptus gibberulus 
(Nicholson), Didymograptus minutus Tqst., Tetragraptus bigsbyi Hall, 
and Phyllograptus angustifolius Hall. The limestone containing these 
fossils is said to belong to the Lower Asaphus zone, but may possibly 
be in the Limbata zone. 
Limbata limestone. From this zone Moberg reports Megalaspis 
limbata, Niobe laeviceps, two pelecypods, two gastropods, and “ Rhyn- 
chonella’’ digitata Leuchtenberg. 
Planilimbata limestone. From this limestone, which is often quite 
glauconitic, Megalaspis planilimbata Ang. and Holometopus limbatus 
Ang. have been obtained. 
The Ceratopyge (76) zone is well developed in Oeland, but, as has 
previously been mentioned, it is variable in its constitution. In the 
southern half of the island a limestone is present in the upper part, 
included between two glauconitic shales, and beneath the lower shale 
is another shale characterized by Shumardia. In the northern half 
of the island the Shumardia shale is absent, also the limestone, and 
there remains only a shale bearing Ceratopyge. The total thickness 
seems to be small, with a maximum of about two meters. 
The Dictyonema shale is, as stated above, present in both the 
northern and southern portions of the island, but absent for a consider- 
able space through the middle. The thickness in the southern part 
of the island is about two meters. 
ScANIA. 
In Seania the strata of the Ordovician consist very largely of 
graptolite-bearing shales, these shales resting upon the Olenus shales 
of the Upper Cambrian. At various horizons, however, beds of 
limestone are intercalated in the shales. No one region presents a 
complete section, and the following composite section contains some 
beds which are found only in East Seania, some found only in West 
at ne 
