INTRODUCTION. XXV 
geologic age of the Klin Sandstones from which Auerbach’s 
plants were obtained has given rise to considerable discussion ; 
the so-called ‘‘ Klin’sche 
must be regarded as homotaxial with the Quadersandstein; on 
the other hand Trautschold,? who has described the plants from 
these strata, insists on the close agreement of the flora with 
that of the North German Wealden. 
opinion as to the age of the Klin beds against that of Eichwald, 
according to Eichwald’ Sandstein ”’ 
He supports his own 
by quoting Dunker’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. 
Calamites, sp. 
Equisetites, sp. 
Odontopteris dubia, Traut. 
Sphenopteris Auerbachi, Traut.=Ruf- | 
Sfordia Gopperti (Dunk.). 
Reussia pectinata, Gopp. 
Asplenites desertorum, Traut. 
A. Klinensis, Traut. (in part) = 
selia Mantelli (Brong.). 
Alethopteris Reichiana (Brong.). 
A. metrica, Traut. 
Pecopteris Whithyensis, Brong. = Clado- 
phlebis Albertsii (Dunk.). 
P. Althausi, Dunk. = Matonidiwn 
Gépperti (Ett.). 
Weich- 
| Pecopteris nigrescens, Traut. 
P. decipiens, Traut. = Mierodictyon 
Dunkeri (Schenk). 
P. pachycarpa, Traut. 
P. explanata, Traut.=? Matonidium 
Gopperit (Ett.). 
Polypodites Mantelli, Gopp. = Weich- 
selia Mantelli (Brong.). 
Glossopteris solitaria, Traut. 
Cycadites acinaciformis, Traut. 
Thuytes ecarinatus, Traut. 
Araucarites hamatus, Traut. 
Pinus elliptica, Traut. 
Auerbachia echinata, Traut. 
Phyllites reguiaris, Traut. 
Several of these determinations have been justly called into 
question by Schenk.’ 
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.‘ 
Carruthers’ 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. Mém. Soe. nat. Moscou, vol. xi. p. 231. 
3 Paleeontographica, vol. xix. p. 261. 
4 Arg. Speeton, pp. 200-201. 
5 Geol. Mag. vol. vill. p. 540. 
