50 ZONITID. 
has also a wide distribution in Ireland. In the north of 
the island it is very abundant. It is not recorded for the 
Isle of Man. Like the rest of the genus it frequents moist 
places under stones and logs almost everywhere. 
Its dull appearance serves to mark it off from the others 
except pura, which small specimens much_ resemble, 
especially on account of the cross striae common to both 
species alike, and which in the young of wz¢¢du/a are more 
noticeable than in the weathered adults. The size of the 
whorls is a guide in this case and the unfinished look of 
the young witidula. ‘The animal of fura is also usually 
lighter. 
Var. I. nitens (Mich.). Last whorl expanding at the 
mouth. 
Var. Il. Hémit (Ald.). White or greenish—a beautiful 
object, and rare. 
6. H. RADIATULA (mznutely rayed) Alder. Pl. II., f. 10. 
Compressed, thin, highly glossy, and exquisitely marked trans- 
versely ; whorls 443 anzmal nearly black. A. 1 mm. B 3? mm. 
As Jeffreys points out, this very pretty little shell 
frequents moister places than pura. It is found in damp 
moss in woods and under decaying logs. Under a lens 
it is a beautiful object and need never be mistaken for 
the next species, which it resembles in shape and size, but 
care should be taken not to confound it with the young 
of zitida which is usually found in similar damp habitats. 
