32 
Stewart — List of Estuarine Clay Fossils. 
Acera bullata, Akerct bullata, F. & H. In the Belfast bed abundantly, 
but restricted to the *zone of Thracia convexci. Plentiful also at Larne, 
where specimens are of small size, apparently the variety nana. 
Action tornatilis, Tornatella fasciata , F. & H. Belfast deposit, (fide 
Grainger). 
Scaphander lignarius. Rare. Three or four specimens only. 
Philine aperta. In abundance. 
Anomia ephippium. This extremely variable shell is distributed through- 
out the clay in some plenty. 
Anomia patelliformis. Rare, (Grainger). 
Ostrea edulis. Shell beds, made up nearly altogether of the common 
oyster, occurred near the base of the deposit, and again repeated near 
the upper surface. 
Ostrea edulis, var. hippopus. Immense shells of this deep-water variety 
scattered through the clay, mainly in the median portion of the de- 
posit. 
Pecten varius. Generally distributed and abundant. 
Pecten opercularis. Along with the last species, and almost equally 
abundant. 
Pecten maximus. Scattered throughout, rather plentifully. 
Lima hians. Very rare in the Belfast bed, abundant in the corresponding 
deposit in Larne Lough. 
Mytilus edulis. Abundant, especially in the basal and superficial por- 
tions of the clay. 
Mytilus modiolus, Modiola modiolus , F. & H. Rare at Belfast, plentiful 
in the Larne bed. 
Mytilus adriaticus, Modiola tulipa, F. & H. Occurs both at Belfast and 
Lame, but is rare. 
tilus adriaticus, var. ovalis. “ Occurred in excavating a channel in 
Belfast Harbour” (J. G. Jeffreys). Some specimens dug out at the site 
of the new floating dock appear to belong to this variety. 
Modiolaria marmorata, Crenelles marmorata, F. & H. Very rare at Bel- 
fast, frequent at Larne. 
Nucula nucleus. Very abundant in the Belfast beds ; rare at Larne. 
Leda minuta, Leda caudata, F. & H. A single valve, (Grainger). 
* See abstract of paper lead by the author on 8th March, in Eighth 
Annual Report of Belfast Naturalists’ Field Club (1871). 
