FKKSII WATER DIATOMS. 
29.") 
IL— DIATOMS OF THE LOWER ST. JOHN AND 
KENNEBECASIS. 
(More or less subject to conditions of salinity.) 
In the Bulletin of the Society for 1910, a somewhat lengthy 
list of the Diatoms found at Harris’s (or Matthew’s) cove on 
the Kennebecasis is given, together with descriptions of the 
genera and illustrative plates, -the assemblage indicating an 
admixture of fresh water and marine forms. As this collection 
is by far the most complete as yet made, as well as that which 
has been most carefully studied, it has been thought well to 
reproduce it here in condensed form, at the same time that an 
attempt is made to distinguish between the species which may 
fairly be regarded as fresh water and those which are estuarine 
or marine. It may thus be taken as a basis of comparison, and 
by making such comparison with the forms obtained from other 
parts of the lower St. John and Kennebecasis, some idea of the 
range of species may be obtained, and possibly some light be 
thrown upon the question of the influence of fresh and salt 
waters respectively upon their distribution. 
The collections, other than that of Harris's Cove which is 
taken as the standard, are arranged in two series, the first 
extending from the foot of the Long Reach and mouth of the 
Nerepis by the Milkish, Grand Bay and the Narrows above 
Indiantown, to St. John Harbor; and the second from Perry’s 
Point at the head of Kennebecasis Bay through Saunder’s Cove, 
Matthew’s Cove, Rothesay and Millidgeville, to where the 
Kennebecasis and St. John waters unite off Boar’s Head. 
The collections referred to have been revised by Dr. A. H. 
MacKay, Chief Superintendent of Education, Halifax, N. S., 
and Mr. Oliver Kendall, of Providence, R. I., and to these 
gentlemen I am indebted for the addition of a considerable 
number of species not determinable with the literature at my 
command. 
