Note. In the red crag of Sutton.
70. Leda rostrata (Nucula sp.), Lamarck.
Syn., Nucula oblonga, Brown.
Loc., fossil. One of the most characteristic shells of the glacial beds, and very generally distributed. [Sweden, Russia.]
Loc., living. In the Arctic Seas.
71. Leda pygmæa (Nucula sp.), Goldfuss.
Syn., Nucula gibbosa, Smith. Nucula tenuis, Phillippi. Nucula lenticula. Möller.
Loc., fossil. In the Clyde beds, evidently in situ. [In the newer pliocene of Sicily.]
Loc., living. Seas of Greenland. Known only in one spot in the British Seas, viz., the Sound of Skye.
Note. Appeared in our seas during the Coralline Crag epoch, between which time and the Glacial epoch it must have been very generally distributed through the European area.
72. Leda (Yoldia) oblongoides, Wood.
Syn., Yoldia angularis, Möller. Variety of Nucula myalis, Couthouy? Nucula hyperborea, Löven? Bramerton.
Loc., fossil. Found by Captain James in the Wexford beds. [Sweden, Canada.]
Loc., living. In the Arctic Sees.
Note. In the red crag (oblongoides); according to Mr. Searles Wood.
73. Leda. sp. nov.?
The fragment of a species resembling in form the Nucula pusio of Phillippi, ('Enumeratio Moll. Sic.,' vol. ii. to xv. J. S.), but having a smooth exterior, has been found by Captain James in the drift beds of Wexford, where we may expect more perfect specimens of both this and the last.
74. Mytilus edulis, Linnæus.
Syn., M. alæformis, Sowerby (M. C), antiquorum, Woodward.
Loc., fossil. In most of the glacial beds of Britain. Mammaliferous crag at Norwich. [Scandinavia, Russia, Canada.]
Loc., living. Seas of Northern and Celtic Europe; Greenland; coasts of Boreal America. [M. borealis, De Kay.]
Note. Fossil in the red crag.
75. Mytilus (Modiolus) vulgaris, Fleming.
Syn. Modiola modiolus and Mytilus modiolus of many authors, but (according to Mr. Hanley) not the Mytilus modiolus of Linnæus. M. papuanus of Lamarck?
Loc., fossil. Scottish and Irish beds. Mammaliferous crag of Portwick.
Loc., living. British and Scandinavian Seas. Coasts of Boreal America.
76. Pecten islandicus (Ostrea sp.), Muller.
Syn., Ostrea cinnabarina, Born. Pecten Pealii, Conrad (fide Gould).
Loc., fossil. Clyde beds, where it occurs with the valves united and evidently in situ, [Russia, Sweden, Canada.]
Loc., living. Seas of Greenland, Iceland, and Boreal America.
