70 - Rhodora [ABRIL 
The same distinction may be seen in smaller compass on a single 
island, even quite a small one, the exposed side having quite a different 
flora from the sheltered inner side. 
North of Camden, the whole of Penobscot Bay may be considered as 
landlocked, and only the algae adapted to quiet waters are to be found. 
It is to call attention to an interesting exception to this rule that this 
note is written. The harbor of Castine is on the east side of the bay ; 
and on the south side of the harbor, near the cluster of houses known as 
Harborside, is the outlet of Goose Creek. Originally little more than 
a brook it is now a pond, narrow, but nearly a mile long, the outlet 
having been dammed, so that for an hour or two at high water, the tide 
runs in swiftly ; for the rest of the twelve-hour interval between tides, 
the water runs out over the dam; at low water there is a fall of about 
fifteen feet. 
The place is very picturesque; wooded hills rise sharply on all 
sides except to the west, where they open out to give a view of the 
broad bay, and of the historic harbor for whose possession four naval 
battles have been fought. An old square colonial mansion, with the 
garden of phlox, hollyhocks and red yarrow is on one side of the fall, 
the ruined buildings of a deserted silver mine on the other, and an 
equally ruined sawmill stands on a rock in the middle. 
But however beautiful the scenery, it would not be entitled to men- 
tion in RHODORA, were it not for the algae that grow here. In the pond 
itself, the temperature in summer is much above that of the bay, and as 
a result of this we have a luxuriant growth of lagoon plants, more like 
what is found in similar places in southern Massachusetts, or on the 
shores of Long Island Sound. Ceramium strictum and Polysiphonia 
Olneyt grow abundantly on the mud bottom, just below the surface of 
the water ; Mesogloia divaricata and Chaetomorpha Linum form float- 
ing masses of great extent, as do many of the Cyanophyceae. 
In striking contrast with this are the algae covering the slopes and 
filling the pools of the outlet. Here we find, only a few feet from the 
warm water plants just mentioned, the characteristic flord of the most 
exposed outer islands. There is a dense growth of Laminaria saccha- 
rina and some Aaria esculenta, each with the usual epiphytes, Ecto- 
carpus species, etc. Leathesia difformis and Chaetomorpha Melagonium 
are plentiful in the pools, and in the swift raceways of the current are 
dense masses of deep green Bryopsis plumosa and dull red Gloiosiphonia 
capillaris. ‘The whole combination would be quite at home on an ex- 
