so 
THIRTEENTH REPORT. 
All of the money available from the survey appropriation for the 
year was put into the botanical work in the western part of the state, 
but, thanks to the generosity of Hon. W. B. Mershou, we were enabled 
to send out another party, to the Charity Islands, Saginaw Bay. Mr. 
Mershou bore the expense incidental to sending five men to the islands 
for different periods of time last summer, and as a result we were able 
to make quite an exhaustive investigation of the fauna and flora. The 
men that we sent up and the groups that they studied were as fol- 
lows : 
X. A. Wood (vertebrates), W. W. Newcomb (butterflies and moths), 
A. W. Andrews (beetles), Frederick Gaige (ants), and C. K. Dodge 
(plants). These men worked for their expenses, and to their enthusiasm 
and energy is due in large part the excellent results obtained. Large 
collections of the different groups were secured, together with volumin- 
ous notes on habitats, etc. The men are now working on their re- 
ports, which will be published in various journals under the general 
title “Results of the Mershon Expedition to the Charity Islands, Sagi- 
naw Bay.” The first one, the general account, has already appeared, 
and the report on the birds, by Mr. Wood, will be published in the 
June number of the Wilson Bulletin. 
In addition to the monographs listed in the last report, we have an- 
other in preparation, “The Amphibians of Michigan,” by Crystal Thomp- 
son and Helen Thompson. This paper is now practically completed and 
awaiting publication. Two other very excellent papers that are await- 
ing publication are a catalog of the more recently described species of 
fresh-water mollusca, by Mr. Bryant Walker, and a bibliography of 
'Michigan archeology, by Mr. Harlan I. Smith. 
The work proposed for next year is as follows: A few weeks work 
on fhe Charity Islands in the early summer to supplement the late sum- 
mer and early fall work of last year, a preliminary investigation of the 
mammals in the region of Osceola county, and the collecting of botanical 
material from various parts of Michigan for a state herbarium. 
In closing I would like to make a plea for more cooperation on the 
part of fhe members of the Academy. It is of the first importance to 
us to have exhaustive data on the occurrence of each species within 
our limits, but we have experienced considerable difficulty in securing 
such material. From no region ligve we enough d,ata, and from many 
regions we have few or no records for most groups. Thus any records 
of occurrence, even though they are of our commonest forms, are valu- 
able. I wish every teacher of biology, or other interested person, in the 
state would get into the habit of sending us such specimens or notes 
as they have the opportunity to obtain. We maintain a record bureau 
at the Museum, and every reliable record received is preserved, whether 
or not it comes to us with a specimen. 
