Page:Memoirs of the Geological Survey of Great Britain, Volume 1.djvu/381

such an assemblage of mollusks now inhabiting the coasts of Greenland (as determined by the researches of the late Dr. Möller,^[1] and formerly by Otho Fabricius^[2]), and such as may be found on the coasts of Massachusetts^[3]),—but approaching most nearly the former, and probably nearest that living on the coast of Labrador.

That the climate, under which the glacial animals lived, was colder, is borne out by an examination of the species themselves. We find the entire assemblage made up—1st, of species now living throughout the Celtic region in common with the Northern Seas, and scarcely ranging south of the British Seas; such are—

Modiola vulgaris
Astarte compressa.
——— danmoniemis.
Cyprina islandica.
Venus casina.
Mactra solida.
Mya arenaria.
—— truncata.
Leda minuta.
Tellina depressa.
Pecten sinuosus.
Pleurotoma turricula.
Buccinum undatum.

Fusus antiquus.
——— corneus.
Lacuna vincta.
Nassa macula.
Purpura lapillus.
Littorina littorea.
———— rudis.
———— neritoides.
Natica Alderi.
Velutina lævigata.
Trochus tumidus.
Patella pellucida.

2nd. Of species which range far south into the Lusitanian and Mediterranean regions, but which are most prolific in the Celtic and Northern Seas; as—

Cardium echinatum.
———— edule.
———— Iævigatum.
Venus fasciata.
Artemis exoleta.
Lucina flexuosa.
Tellina solidula.
Nucula nucleus.
Pectunculus pilosus.
Pullastra decussata.
Saxicava rugosa.
Solen ensis.

Solen siliqua.
Anomia ephippium.
——— aculeata.
Ostrea edulis.
Pecten overcularis.
Aporrhais pes-pelecani.
Patella vulgata.
Dentalium entalis.
Turritella terebra.
Murex erinaceus.
Emarginula fissuca.
Fissurella græca.

3rd. Of species still existing in the British Seas, but confined to the

1. Index Molluscorum Groenlandiæ. Hafniæ, 1842.
2. Fauna Groenlandica, 1780.
3. Gould's Invertebrata of Massachusetts, 1841.