MEDITERRANEAN REGION 585 



by Barrande's Division D 2 , the Drabover beds, consisting- of quartzites, 

 quartz itic sandstones, and clay shales. The series appears to be con- 

 formable with the Kvan-oseker beds, some of the species of the latter 

 continuing upward into the Drabover beds. This horizon is characterized 

 by Dalmanitina socialis Barr., Trinucleus goldfussi (which continues up- 

 ward into D3), Asaplius nobilis, Homalonotus, etcetera. 



These beds represent the Upper Llandeilo horizon. Above them fol- 

 lows with apparent conformity the Trubiner black shales, with occasional 

 intercalations of thin beds of grit (D,,), and the Zahoraner grits and 

 shales (D 4 ). Both these formations contain Trinucleus conpentricus (T. 

 ornatus) and represent approximately the horizon of the American Tren- 

 ton and the British Caracloe. Overlying this are the Konigshofer shales 

 and Kosover quartzites with Trinucleus seticornis, etcetera, which consti- 

 tute the highest Ordovicic, and are followed disconformably by the Siluric. 



The Bohemian series extends into the adjoining region of Bavaria, 

 where, near Hof, the Cambric shales are followed disconformably by the 

 Leinitz shales carrying Orthis cf. desiderata Barr. and corresponding to 

 the Bohemian D d 1 f3. Higher Ordovicic beds are not represented there 

 by fossiliferous strata. 



Lower Obdovicic of the Baltic Region 

 the orthoceras limestone 



This name is in general nse in the Scandinavian region for a limestone 

 series included within the graptolite-bearing shales of the Ordovicic. 

 The name is applied in different sections to limestones not always covering 

 the same geological interval, since some of the subdivisions found in one 

 section may be wanting in another, or may there be replaced by grapto- 

 lite-bearing shales. In the province of Esthonia, on the German-Russian 

 side of the Baltic, similar limestones are developed, though they are per- 

 haps less frequently known by the name of Orthoceras limestone. I have 

 had an opportunity to study these rocks under the guidance of several 

 Swedish geologists in the provinces of Westergotland, Dalarne, and 

 Scania, and have had occasion to consult the recent literature on these as 

 well as the Norwegian and the Bsthonian regions. 



A typical section of this formation is furnished by the classical ex- 

 posures in the hill known as the Kinnekulle on the southeastern side of 

 Lake Venern, near Raback station. This hill and its rich yield of Paleo- 

 zoic organic remains was first made known by the work of Kalm in 1742 

 and of Linnams in 174?, and has since been the object of study of many 

 an eminent investigator, both native and foreign. Angelin in 1852 made 



