424 THE ZOOLOGIST. 
I.—TERRESTRIAL MOLLUSCA. 
UNIVALVES (GASTEROPOD4A). 
Fam. Limacipz. 
Arion ater. The Black Slug.—Abundant. 
A. hortensis. The Garden Slug.—Typical form. Monkhill. 
Var. fasciata (Orange-foot), Monkhill. The young of this species 
are sometimes white. 
Limax agrestis. The Field Slug. — Type, and a yellowish 
variety on nettles. In August I caught a Limax agrestis mounted 
on the top of a Sparganium leaf, coiled round, and feeding on, 
a young Succinea putris. 
L. maximus. The Great Slug.—Abundant everywhere. 
L. levis. The Smooth Slug. Near Ackworth. 
Fam. HeLicip#. 
Zonites cellarius. The Cellar Snail—Common. 
Z. alliarius. The Garlic Snail.—A few specimens on St. 
Thomas's Hill (the hill on which Thomas Duke of Lancaster was 
executed in 1322). 
Z. nitidulus. The Shining Snail. —A few specimens very 
glossy, and much like Z. glaber, on a bank at St. Thomas’s 
Hill. 
Z. purus. The Clear-shelled Snail.— One or two examples 
with the last-named. Frequent among dead leaves in woods. 
Z. crystallinus. The Crystalline Snail.— Common. 
Helix aculeata. The Prickly Snail.—'T'wo dead shells with 
Z. nitidulus. Occurs sparingly in various other places. 
H. aspersa. The Garden Snail. — Abundant in the hedge- 
banks, of all sizes and colours. On May 27th, 1885, many were 
still hybernating in crevices in the rocks, congregated in large 
clusters one upon another. Gwyn Jeffreys states that Helia 
aspersa is destructive in kitchen gardens, and also feeds on wall- 
fruit. I have observed its habits for many years, and have never 
seen it in the act of eating any kind of fruit. I placed a canister 
full of these snails in a bed of strawberries, but I never once saw 
any of them touch the fruit, and have seldom observed them 
eating living garden vegetables. I believe Limaa agrestis and 
L. maximus are the real delinquents. Although this species is 
exceedingly abundant in the neighbourhood of Pontefract,—more — 
