Correspondence — Colonel G. Greenwood. 95 



LitJiostrotion aranea I believe to be of very rare occurrence at Can- 

 nington Park. But one specimen as far as I am aware has been 

 obtained from the locality, and that by Mr. Pring. This specimen, 

 with the others collected by him, are now in the Museum of Practical 

 Grcology in Jermyn Street. I should expect Cyathophyllum MurcMsoni 

 to occur in this Limestone, though I have not as yet seen an example 

 of this species among the Cannington fossils. There are some corals 

 in Mr. Pring's collection from the same locality which would at first 

 sight appear to be of Devonian type, but on account of their obscu- 

 rity and bad preservation it is difficult to determine their nature. I 

 have not observed them in the Mountain Limestone of any other dis- 

 trict. The corals in the Cannington Limestone do not appear to have 

 attained a large size. 



The Limestone in parts is Oolitic in structure, and is identical in 

 character with that developed in the neighbourhood of Bristol. It 

 undoubtedly belongs to the Upper Carboniferous Limestone, and is 

 probably of the same date as those portions of the massive limestone 

 occurring in the Mendips, and in the neighbourhood of Bristol, of 

 which LitJiostrotion Martini is a characteristic coral. 



Small opaque quartz crystals, with double terminations, presenting 

 an Oolitic structure, occur in portions of the Cannington Limestone, 

 of which there is a specimen in the Taunton Museum, with the 

 crystals weathered on the surface, collected by Mr. Baker. 



It is important to observe that there are some specimens in the 

 Taunton Museum, from the collection of Mr. Baker, which I hardly 

 believe are from Cannington Park, though labelled as such, and 

 though some are specimens from the Mountain Limestone. One con- 

 sists of a large polished slab of a Devonian astraeiform coral of un- 

 usual size (Cyathopliyllum Boloniense), and is paleeontologically and 

 lithologically distinct from the Cannington Limestone. The Lime- 

 stone composing this specimen is of a white pearly colour, with a 

 bluish-grey tinge, translucent, highly-crystalline, and impregnated 

 with sulphuret of iron (iron pyrites). I believe Mr. Baker obtained 

 it of Hurford, a stone-mason at Bridgwater, on whose authority he 

 labelled it " Cannington Park." Judging from the quality and size 

 of the specimen, I should think it must be from Devonshire. 



Henburt, Bristol, ci /^ -r> 



Jan. 1872. S. G. PeROEVAL. 



THE GREENLAND METEORIC STONES. 

 Sir,— On the 30th of June, 1862, I sent a letter to the EampsMre 

 Chronicle, entitled "Twenty Steps in the International Exhibition." 

 It ended thus, in reference to a " so-called meteorite " which was 

 exhibited. " All evidence that a meteorite ever fell on earth is un- 

 worthy of belief. The argument for it is this. Nickel, iron, etc., are 

 not found similarly mingled in any other substance on earth. If 

 they were they would not be an other substance, but the same sub- 

 stance. But does it follow from this that the substance comes from 

 heaven? How many other substances must come from heaven by 

 this reasoning ? " In the Geological Magazine for October, 1864, 



