228 Messrs. Jackson and Alger on the 
large and very perfect crystals, in the form of the primary octa- 
hedron, exhibiting the passage of this form into rhombic dodeca- 
hedrons, which they sometimes complete, and thus become 
isomorphous with the Franklinite, which generally presents this 
decrement. They are also sometimes imbedded in earthy oxide 
of manganese, which occurs very sparingly. 
Crossing from Sandy Cove to the Bay of Fundy, about the 
distance of one mile, we came to an indentation called Outer 
Sandy Cove, between which and the inner cove, is a small but 
extremely beautiful lake of fresh water, with a sandy bottom, 
and having a very diminutive outlet into the Bay of Fundy. 
These two coves are nearly connected by this little lake. The 
rocks at this cove present no remarkable peculiarities of structure. 
The shore is composed of immense sheets of trap of the amor- 
phous variety, which shelve or dip towards the Bay of Fundy, 
at an angle of 10 or 15 degrees and finally disappear beneath its 
waters. The most interesting features of this place are the large 
veins of red jasper which appear in parallel ridges, resembling, in 
a striking manner, the brick battlements upon the inclined roofs 
of houses, and extending from the highest part of the shore to 
low-water mark. These ridges stand as monuments to show the 
continual effect of a turbulent sea, which has worn away the 
rock they traverse with comparative facility, and. left them entire, 
or slightly polished, as obstacles to its further encroachments. 
They contain, in some places, geodes of quartz, amethyst, and 
rich specimens of agate, formed by narrow threads of red jasper 
traversing white transparent chalcedony, in a zigzag manner, and 
when polished, constitute beautiful specimens. 
Following the shore of St. Mary’s Bay, eastwardly as we 
leave Sandy, Cove, and examining at low water the fragments 
