42 Mr. De la Beche on the South Coast of England. 



red marl; but it rises again at Beer Head, and from thence towards Sidmoutli 

 occupies an intermediate position between the chalk and the red marl;, until 

 the former disappears at the summit of Dunscombe Hill, on the west of which 

 the green sand caps the hills as far as Peak Hill and High Peak, west of 

 Sidmouth, where it finally leaves the coast, but reappears in the interior, at 

 fifteen miles distance, in a western direction, on Little Haldon Hill, near 

 Teignmouth, resting upon new red conglomerate. 



The green sand in the vicinity of Lyme contains numerous and various 

 fossils ; and in compact nodules of it, called Cow-stones by the masons of the 

 country, there are found occasional remains of the Crustacea. Plate HL fig. L 

 represents a species, the shell of which is so thin that the claws are seldom 

 obtained perfect. The back of a singular fossil crab, from the same kind of 

 stone, which is represented in fig. 2, is the only one of the kind that I have seen. 

 Among the echinites of the green sand near Lyme, I lately obtained 

 one which belongs to the genus named Echinonaus by Mr. Konig, in his 

 arrangement at the British Museum ; and as it is cpiite new, I have given it 

 the name of Echinonaus lampas, from its great resemblance to an antique lamp*. 

 See Plate HL figs. 3, 4, and 5. 



Lias. 



The blue lias makes its first appearance at the base of Down Cliff, rising 

 from under beds of the oolite formation : proceeding westward from thence, 

 it forms the lower and greater part of Golden Cap, Shorne Cliff, and Black 

 Ven : to the westward also of Lyme it forms considerable cliffs ; but the line 

 that separates the green sand from the lias, on that part of the coast, is con- 

 cealed by a beautiful undercliff, composed of fallen masses of chalk and green 

 sand. The last observable portion of blue lias is at a short distance to the 

 west of Culverhole Pointy forming some very low cliffs on the shore. The 

 line of separation between the red marl and lias is likewise masked by the 

 undercliff. At the eastern base of Pinhay Cliffs a small portion of white lias 

 rises from beneath the blue, but is soon thrown down by a fault: it reappears 

 at a short distance west of Culverhole Point, and not far from the commence- 

 ment of the red marl, from which it is separated by a few strata of blue lias. 



A few small faults occur in the blue lias under the church cliffs at Lyme ; 

 the general dip of the lias in that vicinity is gently towards the south-east. 



From the state and elevation of the lias cliffs near Lyme, an excellent op- 



* The specimen is at present in the British Museum. 



