THE MOLLUSCA OF PONTEFRACT AND NEIGHBOURHOOD. 451 
Var. hyalozonata, Taylor.—One specimen in Bondgate, Ponte- 
fract. 
H. hortensis var. subalbida, Locard. — Five or six specimens 
all close together in a ditch near Ledstone, on the sandstone, 
about two miles from Castleford. Shell white, slightly tinged 
with pale yellow near the mouth; thin and glossy. I have not 
yet noticed any hortensis on the limestone on the east side of 
Pontefract. The type occurs at Featherstone, another place just 
on the edge of the sandstone, about half a mile west of the 
limestone. 
H. cantiana. — This species and H. virgata seem to be less 
affected by the weather than some others, On September 16th, 
1866, a warm dry day, I found H. cantiana and H. virgata in all 
stages of growth attached to the vegetation in hundreds on the 
roadsides near Ferry Bridge and Pontefract; but I noticed no 
H. nemoralis, and very few H. arbustorum, species which are 
abundant on wet days. In Ferry Bridge Lane, about a mile 
from Pontefract, there is a horse-trough set in a high bank. 
Whilst resting here a short time on the above date, sitting on 
the edge of the trough I observed a H. cantiana creeping at the 
bottom of the water, which was about nine inches deep. It kept 
constantly raising its head, as if seeking for some means of 
escape. I sat about a quarter of an hour picking the ripe dew- 
berries which overhung the trough, and it remained creeping 
about all that time. There was another cantiana and one H. 
caperata creeping up the wet mossy side of the trough. I took 
the caperata, which was a fine one, but left the cantiana to join 
his friend at the bottom of the trough. 
H. rufescens. — Many depressed forms near Featherstone, 
which may be var. depressa of Locard. J. Wilcock found two 
Specimens with spine (apex) somewhat lower than the outer 
whorls, otherwise they were much like H. obvoluta. 
Var. rubens, Moq.—Wentbridge and Ledstone, among nettles. 
H, concinna. — Milford and Featherstone. The form which 
we are now calling concinna is sometimes sparingly hispid and 
sometimes bald. It is not so flat, nor so wide in the umbilicus 
as some that I have from Monsaldale. I suspect that it is 
much confounded with the var. depilata of H. hispida. 
H. luspida var. fusca, Menke. — Ledstone and Newton, near 
Castleford. 
