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An extinct order of herbivorous dinosaurs, including the genera Stegosaurus, Omosaurus, and their allies.

A genus of Dinosauria found in the Jurassic formation, and remarkable for having several birdlike features.

One of the Enaliosauria.

See Ichthyosauria.

A genus of huge, carnivorous, dinosaurian reptiles from the Cretaceous formation of the United States. They had very large hind legs and tail, and are supposed to have been bipedal. Some of the species were about eighteen feet high.

A genus of fossil saurians found in the Permian formation.

Same as Lepidosauria.

One of the Plesiosauria.

An extinct flying reptile; one of the Pterosauria. See Illustration in Appendix.

Same as Pterosauria.

Same as Mosasauria.

Having the bones of the palate arranged as in saurians, the vomer consisting of two lateral halves, as in the woodpeckers. (Pici).

Like or pertaining to the saurians.

The fossil track of a saurian.

An extinct order of herbivorous dinosaurs having the feet of a saurian type, instead of birdlike, as they are in many dinosaurs. It includes the Largest Known land animals, belonging to Brontosaurus, Camarasaurus, and alied genera. See Illustration in Appendix.

Same as Plesiosauria.

A group of fossil saurians having biconcave vertebræ and the teeth implanted in sockets.

ov. Eng.] -- Tree lizard (Zoöl.), any one of a group of Old World arboreal lizards (Dendrosauria) comprising the chameleons. -- Tree lobster. (Zoöl.) Same as Tree crab, above. -- Tree louse (Zoöl.), any aphid; a plant louse. -- Tree moss. (Bot.) (a) Any moss or lichen growing on trees. (b) Any species of moss in the…