210 
FIFTEENTH REPORT. 
REPORT UPON THE PROGRESS OF THE BIOLOGICAL WORK OF 
THE MICHIGAN GEOLOGICAL AND BIOLOGICAL SURVEY 
DURING THE YEAR 1912-1913. 
BY ALEXANDER G. RETTI YEN. 
Mr. President and Members of the Academy: 
The biological work of the Michigan Geological and Biological Sur- 
vey din ing the past year has been along the lines described in my previous 
report* to the Academy. Every effort has been made to obtain exact 
data on Hie distribution, habitat and habits of the Michigan plants and 
animals, and to organize this data into monographs on the groups and 
reports upon the conditions in particular regions. 
The field work of 1912 was in part carried on by the University 
Museum of Zoology and in part by the Survey, under the plan 
of cooperation that exists between the two institutions. The work done 
entirely by the Survey consisted of a botanical study of the shore of 
Lake Huron between Saginaw Bay and the Straits of Mackinac by C. 
K. Dodge. The aim of this study was to obtain a more detailed knowl- 
edge of the distribution of the species represented in that region. Mr. 
Dodge spent three weeks in the field and has submitted a preliminary re- 
port which shows that specimens representing about 700 species were 
collected and identified, and a large amount of notes on the distribution 
of the different forms was secured. The amount accomplished by Mr. 
Dodge in the time at his disposal is very creditable. 
The field work done under the direction of the Museum was made 
possible by a gift from Hon. George Shiras 3d., Washington, 1). O. Mr. 
Shims assumed a part of the expenses of a preliminary investigation 
of the White-fish Point region, in Dhippewa County. The work was 
assigned to Norman A. Wood, Curator of Birds, and he spent the time 
between July fi and August 14 in an examination of the vertebrate ani- 
mals of the point. In addition to detailed notes on the fauna. Mr. Wood 
secured data on 32 species of mammals, 106 species of birds. 7 species 
of reptiles, and 6 species of amphibians, and this data has been pre- 
pared for publication. Some material of other groups was also obtained, 
and this will be published upon as soon as it has been sufficiently sup- 
plemented. The museum plans to continue this work by a study of the 
other groups of animals and the plants. 
The manuscript reports that are completed and awaiting publication 
are as follows: ( ’. K. Dodge on the flora of Mackinaw Island, and Lamb- 
Inn County and Point Pelee, Ontario, (three reports). Crystal Thompson 
and Helen Thompson on the amphibians and reptiles of the Whitefish 
Point region, N. A. Wood on the birds and mammals of the Whitefish 
point region (two reports). A. W. Andrews on Ihe beetles of the 
Charity Islands, W. \V. Newcomb on a checklist of Michigan moths of 
the family Sphingidae, Bryant Walker on the molluscs of the Charity 
Islands, T. L. Hankinson on a collection of fish from Houghton County, 
and N. A. Wood on a check list of Michigan mammals. 
