Syngnathidæ.

Gill-openings reduced to a very small opening near the upper posterior angle of the gill-cover. One soft dorsal fin; no ventrals, and sometimes one or more of the other fins also absent.

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Chiefly marine fishes, occurring in all parts of the tropical and temperate regions; many species entering fresh waters.

Syngnathus semifasciatus. Tasmania.

——pelagicus. South coast.

——Grayi. North coast.

——margaritifer. Port Jackson.

——pœcilolæmus. South coast.

Ichthyocampus scalaris. West coast.

——filum. New Zealand.

Nannocampus subosseus. West coast.

Stigmatophora argus. Port Jackson.

——nigra. Australian coast.

Gastrotokeus biaculeatus. Cape York.

Solenognathus Hardwickii. West coast.

Phyllopteryx foliatus. Port Jackson.

——eques. Port Lincoln.

Hippocampus abdominalis. Tasmanian coast.

——antiquorum. North coast.

——breviceps. South coast.

——angustus. Ditto.

——novæ-hollandiæ. Port Jackson.