348 MR. A. MAYFIELD ON THE MOLLUSCA OF A SUFFOLK PARISH. 
These ice Aims were about 5 or 6 m.m. thick, smooth on the concave 
side where they had been applied to the stone ; rough from ice 
crystals on the convex surface. When held up to the light and 
viewed from the convex side they were seen to be composed of 
rounded hexagonal plates, about 8 or 10 m.m. in diameter, reminding 
one of the diagrams of squamous epithelium, figured in works on 
anatomy. 
On 22nd December a slight fall of snow enabled the possessors 
of snow sledges to enjoy a few hours sledging the country. 
X. 
THE MOLLUSCA OF A SUFFOLK PARISH. 
By Arthur Mayfield, M.C.S. 
Read 28th January, 1902. 
The parish of Mendlesham occupies a position near the centre of 
the county, and covers an area of 3960 acres. The subsoil is 
mainly a dirty grey clay, with here and there a patch of gravel and 
brickearth. The surface of the land lies at an elevation of from 
180 to 210 feet above the sea level, and may be regarded as the 
watershed of this part of Suffolk. The southern half of the parish 
contains sources of the Gripping, and the northern half is drained 
by the Dove streamlet, a tributary of the Waveney. In summer 
the beds of these streams, as far as they lie within the parish, may 
be trodden dryshod from end to end, and every ditch is also quite 
dried up. In very dry summers like the last (1901) even the ponds, 
of which there is a large number, the clay making a good basin for 
them, are reduced to mere muddy pools. 
The largest bodies of water are the “moats” in the neighbourhood 
