462 MINERALS IN THE [December, 



ciently distinguish this species from all hitherto descri- 

 bed, unless we are to suppose that the remarkable and 

 striking characters of the head have been overlooked, 

 which seems very improbable. 



The general proportions of the body are very similar 

 to those of the Scincus 5-lineata, though it is proper to 

 observe, that the tail of the "only specimen I have seen 

 had been accidentally broken off" within a short distance 

 of its origin. 



I am indebted to Mr. James Keech of Maryland, for 

 this specimen. 



Fig. 2. a. is an enlarged view of the eye, to exhibit 

 the granuliform scales. 



An Account of the Minerals at present known to exist in 

 the vicinity of Philadelphia, By Isaac Lea, 



METALS. 



Blue Carbonate of Copper. Cuivre carbonate bleu, H. 

 This mineral occurs in minute crystals, and in very 

 small quantities, of a beautiful dark blue colour, at the 

 mines on Perkiomen creek, about twenty-two miles north 

 of the city. It is found in veins, with lead and zinc, in 

 the old red sandstone formation. 



Green Carbonate of Copper, Cuivre carbohnte vert, H. 

 Malachite. W. 

 Occurs both radiated and botryoidal of an emerald 

 green colour. Locality and geognosy same as the last 

 species. 



