The Western Australia Cray-fish.

ASTACUS QUINQUE-CARINATUS, t.3.

f.
3 .-- Carapace smooth, rather convex, and with three keels above; the beak, longly produced, ending in a spine, simple on the side and produced into a keel on each side behind; the central caudal lobe rather narrow, indistinctly divided in half, and like the other lobes flexile at the end, the lateral lobes with a central keel ending a slight spine; the hands elongated, compressed, smooth, with a thickened, toothed, inner margin, which is ciliated above; wrist with two conical spines on the inner side.
Inhab.

Western Australia, near Swan River.
3.

The Port Essington Cray-fish.