Impressions of Footsteps in the Sandstone of Dumfries-shire. 203 



which I have regarded as a stem allied to Draccma. The to- 

 tality of their characters, although the almost complete absence 

 of preservation of their tissues does not allow of our anatomizing 

 them, appears to me to render this reference more probable, and 

 to indicate, in particular, the relations between this stem and 

 those of Zamites gigas, found at Scarborough. 



The abundance of Lonchopteris Mantelli is a character of the 

 Wealden formations of the south of England and the department 

 of the Oise, where this fossil seems to present it'self, at all events 

 in fragments, in the majority of the localities where the beds have 

 been uncovered by the working of the potter's clays of this for- 

 mation near Savignies. In Germany, on the contrary, this spe- 

 cies is wanting, and Abietites Linkii appears to be the predomi- 

 nant plant. As to the species of Brachyphyllum, I have not yet 

 been able to study them in nature, but the figures that have been 

 given of them leave me little doubt of their analogy with those 

 of the oolitic epoch. 



The abundance of Cycadese also forms a distinctive character 

 of the Wealden formations of Germany. However, there are, as 

 is seen, several species common to both basins, and I will add 

 that Sphenopteris Gopperti, Dunk., is probably identical with 

 Sphenopteris Phillipsii, Mant. 



I have not included in this list certain marine plants cited in 

 the strata of this epoch: 1. because it appears to me doubtful 

 whether they really belong to the Wealden epoch and not to the 

 Glauconian; 2. because it seems to me still uncertain whether 

 the species cited. Chondrites aqualis and intricatus, are really 

 quite specifically identical with the species of this name of the 

 upper fucoid sand of the chalk. 



[To be continued.] 



jji^ J) 



XIX. — On the position of the Impressions of Footsteps in the 

 Bunter Sandstone of Dumfries-shire, By Robert Harkness, 

 Esq. 



The new red sandstone exists in Dumfries-shire in four separate 

 patches. The one, which occurs in the north-west portion of the 

 country, occupies the smallest area, and rests upon the lower 

 parts of the representatives of the mountain limestone, which 

 from their position and inclination appear to appertain to the 

 carboniferous deposits of Ayrshire. 



The new red sandstone which is met with in the lower portion 

 of the Vale of the Nith, and also in the low country in Annandale, 

 and which covers the greatest extent of surface, seems to lie 

 unconformably upon the altered Silurian formation ; the other 



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