In 1906 The Davenport Academy of Sciences published a thesis by Dr. C. II. Edmonson on the Protozoa of Iowa which is the best list, so far compiled, of the protozoa known to occur in the waters of this state. During my recent observations of these always interesting organisms I have found a number of species which may be considered an addition to Edmondson 's list, including: some forms which further observation may prove to be new. With the list of these are included some notes on more common forms; which may be of interest to students of protozoology.
Proceedings of the Iowa Academy of Science
©1917 Iowa Academy of Science, Inc.
Spencer, Clementina S.
"Observations on the Protozoa - with Descriptions and Drawings of Some Probable New Species,"
Proceedings of the Iowa Academy of Science, 24(1), 335-351.
Available at: https://scholarworks.uni.edu/pias/vol24/iss1/53