FRESH WATER DIATOMS. 
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found in Harris’s Cove where it is quite abundant, and at the 
mouth of the Nerepis. Amphiprora alata, a species difficult to 
detect on account of its delicacy and transparency, has been 
observed at six different stations, ranging from Ingleside and 
Perry’s Point respectively, to Matthew’s Cove, Rothesay and 
St. John Harbor. It is usually regarded as marine. Cocconema 
lanceolatum, a fresh water form, ranges from the mouth of 
the Nerepis to Perry’s Point, but has not been observed in the 
Narrows. Campylodiscus cribrosus, marine or brackish, is not 
uncommon and is widely distributed, being found at Harding’s 
Point, Ingleside, Perry’s Point, Saunder’s Cove, Rothesay and 
Millidgeville. Cocconeidae are very common in nearly all the 
gatherings. The same is true of Mclosira, including M. varians, 
M. nitmmuloidcs and M. suhflcxilis, they often making up the 
bulk of many collections. Epithemia tiirgida, a fresh water 
form, is common in most of the gatherings, except from those 
near St. John, while E. zebra is more rare. Of the Nitschias, 
N. bilobata occurs at the foot of the Long Reach on the one 
hand and at Perry’s Point on the other, as well as at Rothesay. 
Nitschia closterium occurs at the Milkish, Harris’s and 
Saunder’s Coves, but has not been observed at points more 
remote from the sea. It is, however, a marine or brackish 
water species. N. didyma has been observed at Alillidgeville 
and about the docks in St. John Harbor. Pleurosigmas are 
usually marine, and many species abound in the waters of the 
Bay of Fundy, but they are also not uncommon in those of the 
lower St. John and Kennebecasis, the most common perhaps 
being P. attcimatiim, which is really a fresh water species. 
Bacillaria paradoxa, a brackish water species, was not only 
observed, in active movement, at Indiantown and in St. John 
Harbor, but up the St. John to the Nerepis and at Saunder’s Cove 
on the Kennebecasis. Syncdra ulna, a fresh water form, is 
widely distributed. 
On the other hand, as species of very limited distribution, 
so far as the area under discussion is concerned, and some of 
which would seem to be waifs from the ocean outside, may be 
