Zoological Explorations. 293 



Sph.^rium occidentale Prime. 

 Sph.erium partumeium Say. 

 PisiDiuM sp. indct. 



Family unioxid.e. 

 Unio luteolus Lam. 

 ^NIargaritana co:>iplaxata Barnes. 

 Anodoxta ferussaciana Lea. 



On page 167, Vol. II., Xo. 2, of this Bulletin, will be found 

 an acknowledgment of favors rendered the expedition by 

 various persons and corporations. The author desires, how- 

 ever, to make as emphatic as possible his sense of indebted- 

 ness to the officials of the Hudson's Bay Company for their 

 unfailing courtesy and generosity to the representatives of 

 this Universit}-. 



It is proverbial that Science has found its strongest sup- 

 porters in great commercial corporations. An expedition now 

 working in the far North in the interest of this L'niversity 

 was made possible by the liberahty of Sir Donald Smith, 

 Governor of the Hudson's Bay Company, and his associates at 

 Winnipeg and in the Northwest Territories.^ 



C. C. Nutting. 



1 The conception of the undertaking referred to is due very largely to the 

 appreciation of its scientific importance on the part of Roderick Ross Mac- 

 Farlane, Esq., Chief Factor at Cumberland House, who has spent over thirty 

 years in the service of the Company vrithin the Arctic Circle, and whose 

 work on •' Birds nesting within the Arctic Circle '' is constantly referred to in 

 the preceding pages. 



