OSSIFEKOUS CAVE OF CEFJST. 



541 



Fig. 5. 



XX. ON THE FOSSIL KEMAINS FOUND IN CEFN 

 CAVE, NEAR BRYN ELWY, N. WALES. 1 



The cave opens towards the west in a nearly vertical craggy 

 cliff of gray compact limestone which forms the steep eastern 

 boundary of the Valley of the Elwy. The valley runs north 

 and south or NW. and SE. The rock is very fragmented, 

 the cliffs consisting of pieces piled on one another like bricks. 

 There is much yellow cave-earth in the crevices. The cave 

 is at about the middle of the vertical height of the cliff. The 

 opening is something like that of Brixham, but much wider 

 and higher. Near the mouth is a horizontal tunnel-shaped 

 flue, as if hollowed out by sea 

 action. The action of the sea 

 is visible in the cancellar erosion 

 near the mouth. The body of 

 the cavern is formed of a si- 

 nuous fissure, which is more 

 capacious and loftier than that 

 of Brixham, being evidently in 

 a line of fault. In the annexed 

 ground-plan (fig. 5), A indicates 

 the opening : B is a ' steep slide ' 

 branch, running a considerable 

 way upwards to near the face 

 of the cliff, as shown by fresh 

 roots of trees at the upper part; 

 it does not, however, open into 

 daylight, or if so, the opening 

 is blocked up : C is another 

 similar highly inclined branch 

 rising upwards into daylight 

 with a wide opening ; it appears 

 to me to have been the flue, Co P ied from a sketch in Dl '- Falconer's 



,r ■■ i • i i. jf j.T_ Note-book. 



through which most oi the ma- 

 terials were injected and washed into the cave. Both B and 

 C have their floor covered with very slippery yellow loam. 

 The injecta have been washed down chiefly into d, where 

 bones are found. D is an insular irregular cylinder, around 



1 Extracted from notes of a visit by | 1 859. The fossils were subsequently 

 the author to Cefn Cave, on August 27, j identified in London. — [Ed.] 



GROUND-FLAN OF CEFN CAVE. 



