142 JVaiive Crystallized Carbonate of Magnesia. 



tinguished from the coralline chert of the previous beds, are 

 the most beautiful which have any where been yet noticed ; 

 and when well selected and polished, make very pleasing 

 ornaments. 



The island, as well as Barbuda, thirty miles to the north- 

 ward, the Grande Terre part of Guadaloupe, at a similar dis- 

 tance to the southward and eastward, with several others of 

 the West-India Islands, give proof of an extensive formation, 

 more recent than those to which naturalists have heretofore 

 principally confined their attention ; and which is, perhaps, 

 contemporaneous with, if not later than, the Paris Basin, so 

 well described by Cuvier and Brongniart. 



April 10th, 1818. N. N. 



N. B. A few specimens are sent. 



If the above paper be read attentively, in connexion with 

 that in No. I. on the petrified wood of Antigua, it will afford 

 some very curious information to the geologist respecting 

 these petrifactions, and must lead to ititeresting specula- 

 tions respecting their origin, under circumstances so very 

 peculiar, and to which we do not recollect to have heard of 

 any parallel. 



Art. IX. Discovery of JVative Crystallized Carbonate of 

 Magnesia on Staten-Island, with a JVotice of the Geology 

 and Mineralogy of that Island, by James Pierce, Esq. 

 of New-York, in a Letter to the Editor. 



New- York, October 19, 1818. 

 Dear Sir, 



X FORWARD you a few mineral specimens characteristic of 

 Staten-Island, including native carbonate of magnesia, in acica» 

 lar crystals. I discovered this new form and locality of mag- 



