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[In the following catalogue I have endeavoured to rectify the nomenclature of the species. The principal synonyms are given; the chief localities in which the species are found fossil in formations of the Glacial epoch; their distribution at present in the sea; and a concise geological history of each, so far as the British area is concerned.]

The following Cetacea, probably belonging to beds of this epoch are enumerated by Professor Owen:—

Mallotus villosus.

, fossil. Canada (Mr. Logan).

, living, Greenland.

1. Terebratula psittacea. (Anomia sp.), Linnæus.

, fossil. Ayrshire. Bramerton. (Canada.)

, living. Seas of Newfoundland, Labrador, Greenland, and Norway. It is inserted in British lists, on doubtful authority. In a copy in my pos- session of the "Catalogue of North British Testacea," by Captain Laskey, interleaved and enriched with manuscript notes in the author's handwriting, is the following memorandum:—"Terebratula psittacea, Turton. The under valve was found by me on the shore of Aberlady Bay, at low water, and since, a perfect specimen by dredging in the deeps of the Frith of Forth. 20th July, 1825."

2. Terebratula caput serpentis.

, T. aurita, Fleming, T. costata. Lowe.

, fossil. Sweden.