The swiftly flowing South Esk River, confined to its narrow bed, in which numerous rock pools have been worn, the North Esk, a placid stream, subject to tidal influence for some miles; aud the Tamar River, formed by the junction of these two, with a 40-miles course to the sea, and a gradually increasing salinity, offer a specially favourable habitat for various genera aud species of the Diatomacae, and it is interesting to note the distribution of the genera — in some cases indifferent to most severe changes in conditious, in others susceptible to the slightest influences. Thus Actinocyclus Barkleyi I have found at the First Basin, a mile above the bridge, in fresh water, in company with Synedra splendens and Nitzchia rigida and Nitzchia viridis.
History
Publication title
Papers & Proceedings of the Royal Society of Tasmania
Rights statement
In 1843 the Horticultural and Botanical Society of Van Diemen's Land was founded and became the Royal Society of Van Diemen's Land for Horticulture, Botany, and the Advancement of Science in 1844. In 1855 its name changed to Royal Society of Tasmania for Horticulture, Botany, and the Advancement of Science. In 1911 the name was shortened to Royal Society of Tasmania..