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, 
