118 



THE GEOLOGIST. 



paragraph that the rise of the ground mentioned was caused by some neigh- 

 bouring hill or higher land, the weight of which, pressing on soft clay beds, 

 would cause them to rise up, probably at their outcrop. The_ accompanying 



diagram will illustrate this action. If a 

 limestone hill a presses by its weight 

 (see downward arrow g) on a clay stra- 

 tum, b, resting on hard rock, c, the 

 effect of the weight must be to com- 

 oress or flatten the clay bed b. If this 

 clay bed can find a Tent, which it would 

 naturally do at its outcrop, i k, the effect of the pressure would be to cause 

 the clay land to be squeezed out there in the direction of the arrows, he; the 

 highest elevation, or crown of the dome of the raised tract (shown by the 

 dotted lines) being at d. This kind of elevation is not uncommon in gault dis- 

 tricts, which are thus pressed up between the Chalk and Lower Greensand. — 

 Ed. Geol. 



Fossils from Old Red Sandstone at "Whitbatch. — Sir, — It may be 

 interesting to some of your readers to know that I have procured a nearly perfect 

 Cephalaspis Lyellii, from a quarry of the Old Red Sandstone at Whitbatch, near 

 Ludlow. I believe this to be the most perfect Cephalaspis that has been found 

 in this neighbourhood — I only know of one other specimen showing any portion 

 of the body ; that specimen was procured some years ago, from some men that 

 were breakers of stone for the road near Pontrilas ; but the exact locality where 

 it came from is unknown. The quarry at Whitbatch is a very prolific one for 

 Ccphalaspides ; and some very fine Pteraspides have been procured from it. — 

 I am, Sir, yours, &c., Alfred Marston, Cove Street, Ludlow. 



List of Fossils found in the Old Red Sandstone, in the neighbourhood of Ludlow , 

 By A. Marston. 



Species. Localities. 



Cephalaspis Lyellii Whitbatch, Bouldon. 



Selweyi Oakley Park, &c. 



asterolepis Whitbatch. 



Onchus, fish-defence Whitbatch. 



Tteraspis rostratus Downton Hall drive. 



Lloydii Whitbatch. 



■ Crouchii Bouldon, near Bouldon Hall. 



Spiny Stem of Tree Whitbatch. 



Pucoids, very large Bouldon. 



Egg -packets of Pterygotus Whitbatch. 



Fish-Tracks Bouldon. 



Skeleton of a nondescript Animal found near Buenos Ayres. — In 

 8 lM.uk of travels in Spain, published (anonymously) about sixty years ago, the 

 writer, in describing his v'sit to the museum at Madrid, mentions that "The 

 mos1 remarkable and interesting object in the cabinet of natural history (which 

 occupies a suite often rooms), is the skeleton of a nondescript animal which 

 was discovered some years ago, buried about forty feet in a mountain, near 

 Buenos A\ res. The [eneth from its rump to its nose is about thirteen feet: 

 itsheigW a Utile more than six. The breadth and size of its body are very 

 astonisning; and the collar- and blade-bones are not unlike those of the human 

 species. The Legs are uncommonly stout, particularly those behind, which are 

 of such prodigious and wonderful strength that they must have been designed 

 to support, upon occasion, the whole body of the animal reared up ; an idea 

 which is rendered more probable from the length of the claw and the solid 

 piece of hone which projects behind, forming a basis to the leg. Whether it 



