BALTIC REGION 



593 



presence of worn pieces of shale in the basal part of the glauconite sand. 

 The latter gradually becomes calcareous upward, until beds of glauconite 

 limestone with Megalaspis planilimbata become intercalated between the 

 sands, marking the beginning of B II. 



The lower part of the Glauconite sandstone, B I a, contains Obolus 

 siluricus, indicating relationship to the Ceratopyge limestone, which this 

 sandstone probably represents. 



Figure 3. — Section at Oedegarden, Sweden 



Showing contact between Ceratopyge limestone and Stinkkalk of the Upper Cambric. 

 PI =■ Planilimbata limestone ; G, Ceratopyge limestone ; U S, Upper Stinkkalk ; S L, 

 Stinkkalk lenses; A, Alum shale (Upper Cambric). 



The upper division, B I /?, is characterized by Megalaspis leuchtenbergi 

 Lamanski, a close relative of M. planilimbata, of which it may be a pre- 

 nuncial variety. Two other species, Megalaspis bowni Lamansky and 

 Megalaspides schmidli Lamansky, a relative of Megalaspides delecarliens 

 Holm, of the Phyllograptus shale of Dalecarlia, Sweden (Dalarne), also 

 occur here. Other species are Ptychopyge ( ?) inostranzewi Lamanski 

 and Triarthrus ( ? ) angelini Linnarss. There are, further, numerous spe- 

 cies of Orthidse, of which the following are described by Lamansky : 



Orthis recta Pander. 

 striata Pander. 

 transversa Pander. 



transversa var. latestrlata Lamansky. 

 incurva Lamansky. 

 christianiai Kjerulf. 



