Occasional Papers of the Museum of Zoology 7 



34. Spharriuin occidcntale Prime. A large colony of this 

 common and widely distributed species was found in a water- 

 hole formed by the over-turning of a tree on the east side of 

 Charity Island. 



35. Pisidium sp. ? A single specimen of an, as yet, unde- 

 termined species was collected on Little Charity Island. 



PUBLISHED REPORTS OF THE MERSHON EXPEDITION. 



The results of the Mers'hon Expedition and additional work on the 

 Charity Islands carried on by the Michigan Geological and Biological 

 Survey have been partially summarized in the following papers. 



The Mershon Expedition to the Charity Islands, Lake Huron, by A. 

 G. Ruthven, Science, N. S., XXIII, 20S-2G9. 



Results of the Mershon Expedi'tion to the Charity Islands, Lake 

 Huron. 



Birds, by N. A. Wood, Wilson Bull., July, 191 1, 78-112. 



Plants, by C. K. Dodge, 13th Ann. Rept. Mich. Acad. Sci., 191 1, 

 173-190. 



Mammals, by N. A. Wood, ibid., 131-134. 



Preliminary Report on the Coleopetra, by A. W. Andrews, ibid., 

 16S-170. 



Amphibians and Reptiles, by Crystal Thompson and Helen Thomp- 

 son, 14th Ann. Rept. Mich. Acad. Sci., 1912, 156-158. 



The Formicidae of Charit}- Island, by F. M. Gaige, Occ. Papers of 

 the ]\Ius. of Zool., No. 5, 1914. 



The Breeding Birds of Charity Island, with Additional Notes on 

 the Migrants, by N. A. Wood, 14th Ann. Rept. Mich. Acad. Sci., 1912, 

 178-188. 



