Maryland Geological Suevey 289 



the Chlomeker schichten. 1 Bayer published a second paper in 189!) on 

 new plants from the Perucer beds, 2 and collaborated with Fric in the 

 publication of his seventh volume of studies published' in 1901 and con- 

 taining a critical revision of the well preserved and abundant flora of the 

 Perucer beds. The same year Marik J published a brief paper in Bohemian 

 in which several poorly characterized additions are made to the Perucer 

 flora, and more recently Menzel has included some Cretaceous material 

 in his paper on the Conifers from the Cretaceous and Brown Coal of 

 northern Bohemia. 5 According to the latest interpretation " the Bohemian 

 section includes all of the Upper Cretaceous from the older Cenomanian 

 upward into the Emscherian. 



Cenomanian. — The Cenomanian is subdivided into older Cenomanian 

 or lower Quader, comprising the Perucer and Korytzaner Schichten and 

 a younger comprising the Planer, Planer sandstone and Glauconitic 

 sandstone or zone of Actinocamax plenus. The oldest of these beds, the 

 Perucer series, corresponds to the plant beds of Moletein and Kunstadt in 

 Moravia and to the Credneria stage at the base of the Saxon Upper Cre- 

 taceous. 



For the paleobotanist the Perucer beds are the most interesting, since 

 from them one hundred and seventy-seven species of fossil plants have 

 been described by the authors previously cited. The Perucer beds were 

 named by Fric in 1869, who enumerated twenty-two species of fossil 

 plants from them at that early date. The description of the bulk of the 

 Perucer flora is due to Velenovsky and his " Kvetena ceskeho cenomanu," 



1 Fric, Anton, Studien etc., vi. Die Chlomeker schichten. Archiv. Naturw. 

 Landesd. bohm, Bd. x, Nr. 4, 1897, pp. 1-83, tf. 1-125. 



2 Bayer, E., Einige neue Pflanzen der Perucer Kreideschichten in Bohmen. 

 Sitz. k. bohm. Gesell. Wiss., Prag, 1899, pp. 1-51, tf. 1-15, pi. 1, 2. 



3 Fric and Bayer, Studien etc., Perucer Schichten. Op. cit., Bd. xi, No. 2, 

 1901, pp. 1-180, tf. 1-133 (plants) + 1-33 (animals). 



4 Marik, V., Prispevek k. flore ceskeho cenomann. Rozpr. Cesk. Akad. Cis. 

 Frant. Jos. x, tr. 2, c. 3, 16 pp., 2 pi., 1901. 



5 Menzel, P., Fossile Koniferen aus der Kreide und Braunkohlenformation 

 Nordbohmens. Isis, Jahrg. 1908, heft. 2, pp. 27-32, pi. ii. 



Scupin, H., Neues Jahrb. Beilage-Band, 24, 1907, pp. 676-714. 

 Hibsch and Seeman, Blatt Leitmeritz-Triebsch, Tschermak's Min. und Pet. 

 Mitt, neue folge, Bd. 32, 1 and 2 Heft, 1913, pp. 1-128. 



