498 ‘ON THE OCCURRENCE OF VANESSA CHNTA. 
sand in which they occur is in some places obliquely stratified, and is 
underlaid (apparently everywhere) by a deposit of fine sharp gravel, 
also in places obliquely laminated. The unios, though very fragile, 
are of large size and well preserved; and so abundant are they, that 
a cart-load might be collected from some cuttings in less than an hour. 
The following species of these shells have been collected altogether: 
Unio complanatus, with ‘apparently another species, not at present 
determinable ; Cyclas similis, C. dubia; Amnicola porata; Valvata 
tricarinata, V. piscinalis ; Planorbis trivolvis, P.. companulatus, P. 
bicarinatus (?) ; Limnea ‘palustris; Physa ancillaria. 
Around Angus Station there is a general depression of the country, 
but the Nottawasaga river at that spot is still about 30 feet above 
Georgian Bay, this latter lying at a distance of 22 or 23 miles 
to the north of it. The general level at which the shells occur at 
this locality may be taken at from 30 to 40 feet above Lake Huron, 
and at about 90 feet below the surface level of Lake Simcoe. The 
waters of this latter lake probably passed at one period from Kempen- 
feldt Bay into the Nottawasaga valley, and so escaped into Lake 
Huron by a more western channel than their present outlet at the 
Severn. 
August 4th, 1861. 
ON THE OCCURRENCE OF VANESSA CAINIA IN CANADA 
WEST. 
BY W. SAUNDERS, ESQ. 
In Niay last, while on a visit to Port Stanley, I was much pleased 
to find in the possession of a collector there, Mr. William Edwards, 
two fine specimens of Vanessa Czenia which he had captured in the 
vicinity of the Port during the summer of 1858. No further captures 
of this beautiful insect were made until the present season, when, on 
the 30th of July, I received a note from my friend, stating that he 
had taken several specimens a day or two previous. On the 2nd of 
August I paid a visit to the spot where they occurred—which is on 
the railway track, about a mile from the Port. I had not been there 
