6 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Clintonia borealis (Ait.). 
r Prillium undulatum Willd. 
Habenaria obtusata (Pursh). 
Habenaria orbiculata (Pursh). 
Corylus rostrata Ait. 
Alsine borealis (Bigel.). 
Coptis trifolia Linn. 
Ranunculus reptans Linn. 
Ribes prostratum L’Her. 
Ilicoides mucronata (Linn.). 
Cornus canadensis Linn. 
Ledum groenlandicum Oeder. 
Kalmia glauca Ait. 
Andromeda polifolia Linn. 
Chiogenes hispidula Linn. 
Vaccinium canadense Rich. 
Schollera macrocarpa (Ait.). 
Schollera oxycoccus (Linn.). 
Viburnum alnifolium Marsh. 
Linnaea borealis Linn. 
Aralia hispida Vent. 
I arrived at North Bay too late to find any birds breeding, but 
before any extensive migratory movement had begun. The follow¬ 
ing northern species were common during August : Ponasa 
umbellus togata , Dendragapus canadensis, Picoides arcticus , 
Empidonax flaviventris, Perisoreus canadensis, Junco hgemails, 
Zonotrichia albi colli s, /Spinas pinus , Sylvania canadensis, Geo- 
thlypis Philadelphia, Troglodytes hyemails, and Regidus scitrapa. 
In Ontario the Canadian zone has for its characteristic mammals : 
Peromyscus canadensis canadensis , ] Zapus insignis, 2 Sorexfumeus , 3 
Sorex hoyi, and Synaptomys fatuus. Eootomys gapperi, Sciurus 
liudsonicus liudsonicus, Sorex albibarbis, Mephitis mephitica 
mephitica, Putorius vison vison, and probably a few others occur 
in both Hudsonian and Canadian zones, but, with some readily 
explained exceptions, are limited in their southward range by the 
southern boundary of the latter. 
Hudsonian zone . — The bleak northern shore of Lake Superior 
supports a fauna and flora characterized by the presence of so many 
high boreal sjoecies that it must be considered as lying within the 
limits of the Hudsonian zone. Whether this Hudsonian area is 
confined to the immediate vicinity of the lake shore and is sep¬ 
arated from the main transcontinental Hudsonian belt, or whether 
it is continuous with the latter are questions which cannot now 
be answered. Accounts which I heard while at Nepigon of the 
warmer climate and better forest in the region of Lake Nepigon 
lead me to believe that the former supposition may prove to be 
1 This animal is also found in the northern edge of the Transition zone, but only in cool, 
damp woods. 
2 The peculiarities of the single specimen taken in the Hudsonian zone indicate that 
the typical form may be there replaced by another subspecies. 
s The distribution of this species is much the same as that of Peromyscus canadensis 
canadensis. 
