OF THE FIRTH OF FORTH. 99 
I have a young shell (two-thirds grown) 
which I took alive from the under side of 
a stone in a rock pool, at very low water, 
opposite the Marine Hotel, North Berwick. 
It is thinand semi-transparent, with a sharp 
outer lip, the young of this species being 
unlike the mature form. I have gathered 
the shell at the same stage of growth on 
Herm beach, near Guernsey, where MW. 
laevis is not rare (AZ.). 
Cypreea europea (Mont.). 
Largo Bay, ete. (‘B.); Firth of Forth 
(Ed. Mus.). 
Rare on the Edinburgh beach. It becomes 
more frequent as we go east, and at North 
Berwick is sometimes very abundant. At 
North Berwick adult specimens worn 
smooth, and having about two whorls of 
the spire laid bare, are not uncommon (M.). 
We have taken it at North Berwick, Largo 
Bay, Anstruther, etc. 
TV. PLEUROBRANCHIATA— 
BULLIDA. 
Cylichna wmbilicata (Mont.). 
Firth of Forth U/B.). 
C. cylindracea (Penn.). 
Bass Rock, 24 fathoms (Metz. and Mey.) ; 
Firth of Forth (B.); on the beach at 
Dirleton and North Berwick, but not 
plentiful (JZ). 
We have found this species in Largo Bay. 
Utriculus truncatulus (Brug.). 
Firth of Forth (J/6.); common on the 
beach at North Berwick and Dunbar (J/.). 
We have found it on the beach west from 
Aberdour, 
