56 Dakyns — Geological Notes on the Lake District. 



diBCOvered in 1846, among wMcli were " parties separees de squelette 

 (not specified) d'un animal resemblant au Castor (Trogontherium)" ^ 



DESCEIPTION OF THE DOUBLE PLATE IIL 



Trogontherium Cuvieri. 

 Fig. L Front view of left femur. 



2. Back view oiib.' 



3. Distal articular surface, or condyles, ib. 



4. Outer side view of femur and tibia (the latter drawn without reversing.) 



5. Front view of right tibia and confluent part of fibula. 



6. Back view of ib. 



7. Distal articular end of ib. 



8. Calcaneum. 



9. „ of the recent Castor fiber (for comparison). 

 All the figures are of the natural size. 



I 



n. — Notes on the Geology of the Lake Distkict. 

 By J. E. Daktns, of the Geological Survey. 



WISH, through the medium of your pages, to call the attention 

 of Geologists to an important point in the Geology of the 

 English Lake District. 



I made a short tour in that district early in December of last 

 year, when I thought I discovered evidence of an " unconformity " 

 between the beds of the Greenslates and Porphyry series and the 

 Skiddaw Slates. 



I walked from Keswick to Buttermere in company with another 

 geologist, whose name I do not feel at liberty to mention, as I could 

 not get him to agree with me in the view I took of the relation of 

 the two sets of beds to one another. 



We went by way of Littledale, and crossed the watershed between 

 Kobinson and Hindscarth, both of which hills we found to be com- 

 posed of Skiddaio Slates, and not (as wrongly coloured on Euthven's 

 map, edition of 1855) of the Porphyry series. 



When standing on the watershed overlooking the Buttermere 

 valley, and facing Honister Crag, due south of us, I noticed and 

 pointed out to my companion that the beds of the Crag, which are 

 of the Porphyry and Greenslate series, appeared to lie at a low 

 angle of, perhaps, 30° on the Skiddaw Slates, which on our or the 

 north side of the valley, had their normal dip and strike of from 

 50° to 70*^ to the S.S.E., and appeared to have the same on the op- 

 posite side. 



Fig. 1. — EouGH Sketch op Honister Crag, Buttermere Valley. 



N.W. 



A. Greenstone, b. Skiddaw Slates. 



The appearance presented seemed to be of the character shewn in 



1 Nordmann, Decouverte de gites riches en Ossemens Fossiles, faite in 1846 ; 

 Odessa, 8vo., 1847, p. 2. 



