11 



cold climates in general are unpropitious to the 

 production of richly-colored shells, yet he will 

 discover among them some interesting varie- 

 ties. 



ON the coast of Labrador a beautiful sub- 

 stance called Labrador Spar, is found in abun- 

 dance ; for the bright iridescence of its colors 

 it stands preeminent in the mineral kingdom. 

 From a missionary settlement of the Moravians 

 at Okkak, a great number of singular, black 

 anomias have been lately received; they in- 

 habit a salt lagoon near the coast. The varieties 

 of the same shell, from Greenland, are similar 

 and larger. 



THENCE, along the coast of America, the 

 only species that has been found worthy of no- 

 tice, is the Ostrea Arborea, or Tree Oyster. 

 In the Chesapeak, at Norfolk, Hampton, 



