27 
•examination of the collections made in this group from the 
opening of the Station to the midsummer of 1896. It is accom¬ 
panied by ten plates. 
Mr. Hempel’s observations on the Protozoa and the Rotifera 
of the Station, accumulated during two years’ continuous study, 
are in hand in the form of a completed manuscript, accompanied 
by thirty folded sheets setting forth in tabular form the distribu¬ 
tion of the various species at each substation and also through¬ 
out the Station field for the different months of the year. This 
report was finished last September and will be printed without 
delay. 
Dr. Ivofoid has lately filed a report, which is about to go to 
press, on methods and apparatus in use in plankton work at 
the Station, accompanied by seven illustrative plates. He lias 
in hand six other papers, which will doubtless be ready for 
publication before the end of the current fiscal year. These will 
include reports on the local distribution of the plankton in the 
Illinois River and its adjacent waters, on the sources of error 
in the plankton method, on the plankton of the river during the 
years 1894, 1895, and 1896, on the plankton of Phelps Lake,— 
a body of water of the ephemeral type,—an article on Trocho- 
sphcera, and one on Cotylaspis insigne —a remarkable parasite 
of the river clams. 
Professor Smith has under way a general report on our 
oligoclnete collections, to consist of about fifty pages of text 
with several plates. This report will contain a synoptic key 
and illustrated descriptions of species for use in identifying 
forms occurring in the State. 
Mr. Hart, Station Entomologist, and Mr. J. G. Needham 
are working conjointly upon a report on the dragon-flies of the 
Station waters and their vicinity, and a list of the mollusks with 
biographical and oecological notes is in course of preparation by 
Mr. Hart. 
Two senior students of the zoological department of the 
University, Mr. E. B. Forbes and Mr. F. W. Schacht, are en¬ 
gaged in thesis investigations, under the personal supervision of 
the Director of the Station, which will result in the preparation 
and publication of papers on entomostracan groups, one the 
Cyclopidae, the other the Centropagidse, of North America, in¬ 
cluding of course the Station collections. 
