Habitat ad Patagoniæ oras Orientates (Sea Bear Bay). Mus. nost.

6. Anatina elliptica.

A. testâ ellipticâ, subtenui, transversim striató, anticè sub-truncatâ, epidermide fuscâ, tenui; long. 1⅜; lat. 2⅜; poll.

Habitat ad oras Antarcticas (New South Shetland). Mus. Brit., nost.

This shell was found at New South Shetland, by Lieutenant Kendall, of his Majesty's sloop, Chanticleer, by whom it was presented to me.

7. Mactra edulis.

M. testâ subtrigonâ, tumidâ, sublævi, fulvo-squalidâ, intus albâ, dentibus lateralibus prominentibus; long. 2; lat. 24⁄8; poll.

Habitat in freto Magellanico (Port Famine). Mus. Brit., nost., Brod.

This shell was found in great abundance on the flat of sandy mud, which fronts the west shore of Port Famine, and proved a

valuable article of food to the ship's company, particularly during the winter months, when sea-birds and game were not to be procured, and the fish had deserted us. I have named it, in allusion to its affording us a grateful, as well as seasonable, supply of fresh food.