Pleuronectidæ.

Body strongly compressed, flat, with one of the two sides, which is always turned upwards, coloured, whilst the other is colourless and only sometimes spotted. Both eyes are placed on the coloured side; and although the bones are present on both sides of the skull they are not equally developed or symmetrical.^* Dorsal and anal fins exceedingly long, without divisions. Gills four; pseudobranchiæ well developed; air-bladder none.

Carnivorous fishes, living on the sandy bottom of the coasts of all the regions; many ascend rivers.

Brachypleura novæ-zeelandiæ. New Zealand coast.

Pseudorhombus Russellii. North coast.

Ammotretis rostratus. Tasmanian coast.

Rhombosolea monopus. Australian coast.

——tapirina. Ditto.

——leporina. Ditto.

Peltorhamphus novæ-zeelandiæ. Norfolk Island.

Solea microcephala. Port Jackson.