398 THE AMERICAN NATURALIST. [VoL. XXXII. 
During the second and third years maps of a number of 
northern lakes have been prepared. A general survey of the 
Turkey Lake fauna has been published. A very large amount 
of material has been collected to illustrate the annual variation, 
the birth-mean, and the effect of selective destruction. Two 
papers on variation have been published, but most of the 
material is still to be examined. 
As to the future, the Winona Assembly has offered to erect 
two buildings, each 20 X 57 feet and two stories high, on the 
shores of Eagle or Winona Lake, Indiana, eighteen miles from 
our present location. This lake had been decided upon for the 
location of the station in the first instance, but was given up 
because no suitable building was available. The trustees of the 
university have agreed to appropriate $1000 for the permanent 
equipment of these buildings. They will be ready for occu- 
pancy in 1899. Aside from laboratories for bacteriology, 
physiology, embryology, zodlogy, and botany, there will be 
about a dozen small rooms for the instructors and for visiting 
naturalists who care to make use of the facilities offered. 
Courses of instruction will be offered in the subjects mentioned. 
The study of variation will be continued and other problems 
will be added, one of which will be the rearing of cave animals 
in the light. 
ILLINOIS BIOLOGICAL STATION. 
For a number of years the investigation of the aquatic life of 
the lakes and streams of Illinois has been prosecuted under the 
auspices of the State Laboratory of Natural History, in connec- 
tion with the Natural History Survey now in progress in the 
state, under the direction of Prof. S. A. Forbes. From time 
to time parties equipped for biological exploration have been 
sent out, and have occupied temporary posts of observation on 
the Mississippi River or elsewhere. No permanent station was 
established, however, until April, 1894, when, with the joint 
support of the State Laboratory of Natural History and the 
University of Illinois, a station was opened upon the Illinois 
River at Havana. For the equipment of this work $1800 was 
