76 COLLINGE : BURROWING HABITS OF CERTAIN MOLLUSCS. 
phan haliotidea Drap. This is the only species of this 
ge whose habits I am cognizant with. ‘The greatest depth 
I nic found it at is from four to five feet. Tate mentions that 
they burrow from one to two feet in winter. 
Testacella scutulum Sow. Mr. Quilter (Journ. of Conch., 
, 1888) records having found this species at a depth of 
eighteen inches. 
Testacella maugei Fér. Dr. Jeffreys mentions that his gardener 
found a specimen of this species at a depth of about two feet, 
among celery roots. 
Achatina acicula Miill. During the summer J have found this 
species at a depth of from four to six inches. The Rev. Henry 
Housman (Our Museum, p. 130) mentions the discovery of 
a number of human skeletons near Chichester, the bones of 
which were infested with this species, at a depth of about three 
feet below the surface. They have also been found at con- 
siderable depths in Yorkshire in Saxon co 
The above four species should be distinguished from the 
following, as they are of decidedly subterranean habits. 
Limax maximus L. Mr. F. Rhodes (Science Gossip, p. 199, 
August 1890} found two specimens of this species under a stone 
weighing about two hundredweight and buried from four to six: 
inches in the ground. 
Limax arborum B.-Ch. Occasionally found in rotten beech- 
trees, two and three inches beneath the bark 
Arion ater L. Often met with in winter three and four inches 
beneath the surface. 
Arion bourguignati Mab. Five specimens found with Z. maxémus. 
Geomalacus maculosus Allm. ‘ Dr. Allman describes this slug as 
possessing a singular power of elongating itself so as at times 
to assume the appearance of a worm; by this means it can 
insinuate itself into apertures which we could scarcely conceive 
it possible for it to enter.’ Rimmer states that Dr. Jeffreys 
informed him that some specimens he (Dr. Jeffreys) had, crawled 
through some holes, ee wgilee a an inch in diameter, in a tin 
box in which they had been se 
Hyalina cellaria Miill. I have a specimens of this shell from 
six to eight inches deep in both summer and winter. 
Hyalina alliaria Miill. Habits similar to preceding species and 
found with it at about the same depth. Mr. Rhodes found two 
specimens with Z. maximus. 
Naturalist, 
