278 



THE GROLOGIST. 



sideration have the same thickness of the calcareous tube. The fomer occurs 

 only at Speeton and the latter at Hunstanton ; in order to distinguish the two, 

 the title " irregularis " may; be applied to the latter as a variety. 



Serpula triserrata, a species found on a specimen of Ammonites complanatus, is 

 distinguishable by its three serrate longitudinal ridges. A similar form occurs on 

 ostrese from the Kimmeridge clay of West Norfolk. 



Terebratula semiglobosa is common at Speeton, but very rare at Hunstanton. 

 T. biplicata is very common at Hunstanton, but is not knoAvn at Speeton. 



Inoceramus Iseviusculus, Bean, a large smooth species something like I. Cuvieri. 



The Ammonites alternatus of Woodward is now lost ; it was probably a variety 

 of A. serratus, Park. 



Belemnites minimus is sometimes two inches long in the Hunstanton Cliff. 



The vertebra of Polyptychodon would be, if perfect, about six inches in diameter 

 and three in thickness. 



The small specimen figured in Geologists' Association Proceedings, Plate II. 

 fig. 9, evidently belongs to the Turbinohan family of corals, and possibly' to the 

 genus Trochocyathus instituted by Messrs. Milne-Edwards and J. Haime, in 1848. 

 The specimens as yet obtained are not sufticiently numerous nor perfect for a 

 rigid comparison with other forms, or to admit of a sufficiently detailed descrip- 

 tion should the species prove to be new. The constricted form of growth is 

 very common in the Parasmilia of the Upper Chalk, and has no specific value. 



The characteristic fossils of the Red Chalk at Speeton are Terebratula semiglo- 

 bosa, Belemnites minimus, and Vermicularia elongata ; and at Hunstanton, Tere- 

 bratula biplicata, Belemnites minimus, and Spongia paradoxica. 



FOREIGN CORRESPONDENCE. 



Notices of the Meteorite of Tulhagh and of the Tertiaries of Horn. 

 Bead before the Imperial Academy of Sciences, Vienna^ 7 th March, 

 1859. Communicated hy Count Marschall. 



1. — Meteoric Stones. 



The meteorite which fell, Oct. 13, 1838, near Tulbagh, Cold Bokkeveld 

 (Cape of Good Hope), already analyzed by Prof. Faraday, has been 

 submitted to a new investigation by Mr. Harris, in Prof. Wohler's 

 laboratory at Gottingen. This meteorite, ' in its black, opaque, and 

 soft substance, greatly resembles that of Kaba (Hungary). 



The analysis discovered in it 1.67 per cent, of carbon, and 0.25 per 

 cent, of the same bituminous substance as was met with in the Kaba 

 meteorite, a substance declared by Prof. Wohler to be of undoubtedly 

 organic origin. The inorganic constituents found in this meteorite 

 are, iron, 2.50; nickel, 1.30; sulphur, 3.38; silica, 30.80; oxydu- 

 lated iron, 29.94 ; magnesia, 22.20; lime, 1.70; alumina, 2.05; 

 oxide of chrome, 0.76; potash and soda, 1.23 ; oxide of manganese, 

 0.97 ; copper, 0.03 ; vestiges of cobalt and phosphorus, deficit, 1.22 



