Class, Crustacea; Sub-class, Podophthalmata; Order, Decapoda; Tribe, Oxystomata; Sub-order, Anomoura; Family, Astacidae; Genus, Astacus; Species, Fluviatilis,

Synonym. - Astacus Fluviatilis.

Common Cray-fish.

A proving of this appeared in vol. i. of North Amer. Journ. of Horn.

Part employed. - The live crustacean, bruised to a pulp.

Preparation. - Tincture (rectified spirit).