100 THE NAUTILUS. 
discovered on the cliff side on May 9, 1893, all still in hibernation. 
In the more elevated parts of a small piece of rather swampy woods 
off the St. Foye road, not far from the city limits, this shell was 
rather common. Living shells all presented a more or less worn 
appearance, the tooth was often lacking in seemingly full-grown in- 
dividuals, and they seldom approached in size, and were generally 
more fragile, than those occurring on the Isle d’Orleans. From this 
I should judge that their surroundings were not exactly healthy or 
suitable ones, and they no doubt owe their existence here to the fact 
of the wood being a private preserve, comparatively undisturbed by 
man or beast. No other Mesodon was seen here. 
This good species was first taken in the vicinity of Quebec City 
by Mr. Latchford, of Ottawa, Ont., the occasion being a visit to the 
Isle d’Orleans on August 16, 1891. Since that date a good number 
have been taken there, all, without exception, on the cliffs on both 
sides of the islands; at some places within a few yards of high water 
mark of the St. Lawrence River. On the cliffside having a northern 
exposure, the vegetation is decidedly rank, and where there is a good 
deal of moist, shaly rock mixed with dead leaves, etc., live speci- 
mens are sure to be plentiful and in fine condition. 
On May 27, 1893, chiefly from an old unused path on the cliff 
side, I made the following capture: Selenites concava Say, 66 ; Pyra- 
midula alternata Say, 59; Polygyra albolabris Say, 1; Polygyra 
dentifera Binn., 71; Polygyra sayti Binn., 29; Polygyra monodon 
Rack., 15; Succinea obliqua Say, 9—all good and mostly living 
shells. 
Poiygyra sayii Binn. This species is more widely distributed than 
P. dentifera Binn. along the cliff side on the mainland (northern 
exposure only). On the island it occurs with MM. dentifera, but 
never in abundance (except on the above-mentioned occasion). It 
has also been taken rarely in the woods which cover a good part of 
the island. ‘This species appears to be more hardy than the other 
Polygyra; it does not go into hibernation nearly so early in the fall. | 
Unfortunately, eaten shells are rather too conspicuous. 
It took me a whole season to get used to the habits of these spe- 
cies, so as to know just where to look for them, often going home 
nearly empty-handed when I had really been in the midst of them. 
When hibernating, they are most easily seen, the beautiful white 
(sometimes pinkish) lip of P. dentifera Binn. catching the eye when 
exposed to view. Early in the-spring, when just out, they are more 
