the lawn, very frequently crawl towards me, and would do so again and again when removed to a distance. As the weather became cold they always hibernated, closing the mouth of the shell with a thin, firm covering, or operculum, of chalk, which, mixed with their slime, made a substance like plaster of Paris. Thus enclosed they would lie as if dead until the warmth the following spring made them push the door open and come out, with excellent appetites, ready to eat voraciously to make up for their long fast. These Roman snails were quite five inches long when fully extended, and therefore were much larger than our English species; the body was cream colour and the shell a pale tint of buff varying somewhat in different specimens.
These creatures were kept in a fem case with glass top and sides, and it was singular to observe the way in which they could suspend themselves (as shown in the drawing) from the top of the box.
The substance which exists in the caterpillar of the silkworm moth, and which can be drawn out into fine shreds of silk, is very similar to the
