Six recently hatched _H. pomatia_ were placed in a box and regularly fed on lettuce and cabbage leaves from August until December, when they buried themselves in the soil for winter; at this period they had gradually increased in dimensions to the size of _H. hispida_. On the 1st April following, the box was placed in the garden, and on the 3rd the Helices reappeared on the surface, being _no larger_ in size than they were in December. Although regularly fed up to 20th June, they were not perceptibly larger, but on that day five of them disappeared, having buried themselves, with the mouth of the shell _downwards_, in the soil. After ten days they reappeared, having in that short time grown so rapidly as to be equal in size to _H. pisana_. On the 15th July they again buried themselves, and reappeared on 1st August, having again increased in size. For three months from this date they did not become perceptibly larger; on 2nd November food was withheld for the winter and they became dormant. A similar experiment, with similar results, was carried on with a number of _H. aspersa_, hatched on 20th June. During the summer they grew but little, buried themselves on 10th October with the _head upwards_, and rose to the surface again on 5th April, not having grown during the winter. In May they buried themselves with the _head downwards_, and appeared again in a week double the size; this went on at about fortnightly intervals until 18th July, when they were almost fully grown. _Helix nemoralis_, _H. virgata_, _H. caperata_, and _H. hispida_ bury themselves to grow; _H. rotundata_ burrows into decayed wood; _Hyalinia radiatula_ appears to remain on decaying blades of grass; _Pupa umbilicata_, _Clausilia rugosa_, and _Buliminus obscurus_ bury their heads only.