MOLLUSCA IN THE NEIGHBOURHOOD OF PONTEFRACT. 423 
stone-colour, freely sprinkled with blackish brown (or almost 
black) irregular marks, angular lines, or dots ; () pale greenish 
white, very much scrubbed over with irregularly-shaped marks 
and minute dots, which become more conspicuous towards the 
larger end, round which they form an unevenly-defined zone ; 
(ec) stone-colour, more or less covered with irregularly-shaped 
marks of umber-brown; (d) pale stone-colour, with a faint 
greenish tint, sparingly sprinkled below the bilge with very 
small blackish-brown freckles, none of which seem sunk into the 
surface, the upper portion splashed with bolder marks of umber 
and deep chestnut-brown ; (e) rich warm stone-colour, abundantly 
covered with blotches of chestnut and umber-brown, interspersed 
with minute dots, freckles, and fine linear scribbling marks 
of dark brown. Length, 1 in. 4} lines; breadth, 1 in. 
(Ohinitahi, July 27, 1885). 
NOTES ON LAND MOLLUSCA OCCURRING IN THE 
NEIGHBOURHOOD OF PONTEFRACT. 
By Grorce RoBerts. 
Tue neighbourhood of Pontefract has long been a favourite 
hunting-ground for conchologists and botanists. The town stands 
partly upon the outcropping edge of the Magnesian Limestone 
which runs across Yorkshire, partly upon the Carboniferous Sand- 
stone, and partly upon a bed of sand, the latter being mined and 
quarried in various places for moulding purposes. The soil is in 
some places six to nine feet deep, and, on the east side of the 
town, produces fine crops of liquorice and other vegetables. The 
visitor on alighting from the railway finds himself surrounded 
by liquorice grounds, and market gardens filled with cabbages, 
French beans, peas, and potatoes. Besides the diversity in the 
strata, in the soil, and in the vegetation, there are many old 
disused quarries, marl-pits, sand-pits, ivy-covered walls, high 
grassy banks, and cliffs; hence we find suitable habitats within a 
small area for a great variety of plants, insects, and mollusks. 
Most of the under-mentioned Helices, with varieties, have 
been collected within the last three years; the others have been 
noticed in previous years, 
