Extent ami Produce of the Tea Plaiitatious in Assant. 161 



to eni-ich our own dominions, and pull down the liaughty pride 

 of China, I shall feel myself richly repaid for all the perils, 

 and dangers, and fatigues, that I have undergone in the cause 

 of British-India tea. 



Jaipore, 10th June 1839. 



On the Calcareous and Siliceous Microscopic Animals which 

 form the chief component parts of Cretaceous Bocks. By 

 Profes.sor C. G. Ehrenbf.rg.* 



In the year 1836, the author communicated to the Aca- 

 demy, that, in the course of his examination of chalk and 

 other limestones, he had found a characteristic feature in the 

 smallest grains of chalk, which, if not identical with, was 

 very similar to crystallisation, and consisted in these appearing 

 as regular elliptical granular-foliated particles. Further re- 

 searches regarding organic influence on the formation of lime- 

 stone have afforded him new and remarkable results. The 

 chalk of Puskaresz, in East Prussia : of the Island of Riigen ; 

 of Schonen ; of the Danish Islands ; of Gravesend, Brighton, 

 and Norwich, in England ; of Ireland ; of Meudon near Paris ; 

 and from Cattolica and Castrogiovanni, to the coast at Gir- 

 genti, in Sicily, exhibits two different conditions ; one inor- 

 ganic, which is distinguished by its extremely regular ellipti- 

 cal gramdar-foliated pai'ticles, and their fragments or begin- 

 nings ; and the other organic, consisting of microscopic poly- 

 thalamia'. Every thing that has been said of microscopic cal- 

 careous animals, — creatures so minute as to appear only like 

 very small grains, — of nautili, or polythalamiae of the sea-sand 

 and of the tertiary formations,— all that has been said of these, 

 from the period of Janus Plancus, and Soldani, now a cen- 

 tury ago, up to the most recent times, is far surpassed by the 

 countless myriads of animals, much smaller in dimensions, and 

 much less visible to the naked eye, which the author has ob- 

 served forming whole mountains of chalk. Although D'Or- 



* From the Reports of tlic Eoyal Pnissijm Aciuloiny. Translated from 

 Poggon(lorft''s Annalon, 1839, No. 7- 



vol,, xxvrii. xo, i,v. — rAN'rvnv 1840, h 



