INTRODUCTION". XXV 



geologic age of the Klin Sandstones from which Auerbach's 

 plants were obtained has given rise to considerable discussion ; 

 according to Eichwald 1 the so-called " Klin'sche Sandstein" 

 must be regarded as homotaxial with the Quadersandstein ; on 

 the other hand Trautschold, 2 who has described the plants from 

 these strata, insists on the close agreement of the flora with 

 that of the North German Wealden. He supports his own 

 opinion as to the age of the Klin beds against that of Eichwald, 

 by quoting Bunker's views, based on an examination of the 

 plants. The following is a list of the species given in Traut- 

 schold's Monograph ; he points out the admixture of Jurassic 

 and Cretaceous forms, and recognizes that some of the species 

 undoubtedly give a Wealden facies to the flora. 



Catamites, sp. 

 Equisetites, sp. 

 Odontopteris dubia, Traut. 

 Sphenopteris Auerbachi, Traut. =Ruf- 



fordia, Gopperti (Dunk.). 

 Reussia pectinata, Gopp. 

 Asplenites desertorum, Traut. 

 A.. Klinensis, Traut. (in part) = Weich- 



selia Mantelli (Brong.). 

 Alethopteris Reichiana (Brong.). 

 A. metrica, Traut. 

 Pecopteris Whitbyensis, Brong. = Clado- 



phlebis Albertsii (Dunk.). 

 P. Althausi, Dunk. = Matonidium 



Gopperti (Ett.). 



Pecopteris nigrescens, Traut. 



P. decipiens, Traut. = Microdictyon 



Dunkeri (Schenk). 

 P. pachycarpa, Traut. 

 P. explanata, Traut. = ? Matonidium 



Gopperti (Ett.). 

 Polypodites Mantelli, Gopp. = Weich- 



selia Mantelli (Brong.). 

 Glossopteris solitaria, Traut. 

 Cycadites acinaciformis, Traut. 

 Thuytes ecarinatus, Traut. 

 Araucarites hamatus, Traut. 

 Pinus ellipttca, Traut. 

 Auerbachia echinata, Traut. 



Phyllites regularis, Traut. 



Several of these determinations have been justly called into 

 question by Schenk. 3 



These plant beds of Klin, Tatarowo, etc., are placed by Pavlow 

 and Lamplugh on the same horizon as the Upper Portland 

 (brackish or Purbeckian type) and the Hils Conglomerate. 4 

 Carruthers 5 has expressed the opinion, in a footnote to a paper 

 in the eighth volume of the Geological Magazine (1871), that 

 the facies of the Klin flora is Cretaceous in character. 



1 Bull. Soc. nat. Moscou, vol. xxxiv. 1861, 4, p. 432. 



2 Nouv. Mem. Soc. nat. Moscou, vol. xiii. p. 231. 



3 Pakeontographica, vol. xix. p. 261. 



4 Arg. Speeton, pp. 200-201. 



5 Geol. Mag. vol. viii. p. 540. 



c 



