218 bulletin: museum or comparative zoology 



Below this is the stratum filled with Sphaeronis pomum Gyllenli. 

 as at Kinnekulle. 



Lower Asaphus limestone. This is a gray limestone from which 

 Pterygometopus sdcrops, Megalaspis hews, Ptijchopyge applanata, 

 Niobe fro72iaJis, lUacnvs csmarki, Ami^y.r iiasidus, Orthis ohtusa, and 

 Glyptocystitcs cf. leuchienhcrgi have been reported. Asaphus expanses 

 is not found in Oeland. 



Holm (65), has described, from a glauconitic gray limestone at 

 Halludden near Boda in northern Oeland, Isograptus gihheruhis 

 (Nicholson), Didymograptus minutus Tqst., Tctragraptus bigshyi Hall, 

 and PhyUograptus angusiijoUus 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 " Rhyii- 

 chotiella" digitata Leuchtenberg. 



Planilimbata limestone. From this limestone, which is often quite 

 glauconitic, Megalaspis planilimbata Ang. and Holovietopus 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 Scania 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 Scania, some found only in West 



