The name of a shrub which at once destroys the vena medinensis, and saves the trouble of drawing it out. It is found and used on the coast of Guinea. See Phil. Transacts 2.

A Stalls, or Astacus Martnus, (from α, neg. and to distil,) so called from the hardness and dryness of its shell. The lobster and crab hardly differ in any quality one from the other. They seem to contain a less proportion of azote than the flesh of quadrupeds, birds, and even of the amphibia, from the small quantity of volatile alkali obtainable from their substance. Notwithstanding which, they are supposed to neutralise acidity in the primae"viae more perfectly than any other animal food of quadrupeds and birds. They afford, as we have said, (see Aliment,) a light easy food; but a small portion will sometimes occasion violent colic, and nettle rash, as occurs from eating muscles, attributed to idiosyncrasy of particular persons, perhaps to the food of the animal. Their flesh is best in summer. The black tips of the claws of the sea crab, and those stony concretions in the heads of the astacus fluviatilis, called crabs' eyes, form some of the absorbent preparations of the shops. See Cancer fluviatilis, and Oculi canchorum.

Astacus fluviatilis. The crevis or cray-fish. A mild insipid food, with few qualities to recommend it, or dissuade from its use.