Fishes.

The Rays and Skates are flat fish, but with only cartilaginous bones. A Shark (Carcharias lamia), from the South Atlantic, hangs in the ground floor, over [unclear: Case.] 2.

Among the smaller Sharks and Dog-fishes the most interesting is the Port Jackson Shark (Cestracious philippi), which has pavement-like teeth, and is the only living representative of a group that once was common Still more remarkable is the Baramoonda (Ceratodex forsteri), belonging to the Dipnoid Fishes, which connect true fishes with amphibians. This fish belongs to a genus that existed in the early part of the Secondary era, but was thought to have become extinct, until a few years ago the present species was found in the rivers of Queensland The Oblong Sun Fish (Orthagoriscus truncatus), the Trigger Fish (Batistes), the Globe Fish (Tetrodon), Porcupine Fish (Diodon), the Trunk Fish (Ostracion), and the Seahorse (Hippocampus) have the gill openings very small, and the body covered with spines or plates.

Among the true or bony fishes we have the Remora Sucking Fish (Echeneis naucrates) and Holocentrum samara, remarkable for the long spine in its anal the curious Pterois volitans, and several beautiful fishes very high and very thin, such as Chœtodon, Zanclus, &c., The curious Pegasus draco is sometimes put among the Seahorses and Pipe fishes on account of its mouth. The Toad Fish (Synaceia verrucosa) is one of the ugliest fishes. The Labridœ are well represented. They are when living, the most highly-coloured of all fish, but their colours unfortunately fade on death.