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Any one of several species of fossil suarians belonging to Teleosaurus and allied genera. These reptiles are related to the crocodiles, but have biconcave vertebræ.

Any one of numerous species of small, conical fossil shells found in Paleozoic rocks. They are supposed to be pteropods.

A genus of brachiopods which includes many living and some fossil species. The larger valve has a perforated beak, through which projects a short peduncle for attachment. Called also lamp shell.

A division of Crinoidea including numerous fossil species in which the body is covered with tessellated plates.

pecies it includes only the pearly nautilus. Numerous genera and species are found in the fossil state, such as Ammonites, Baculites, Orthoceras, etc.

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

A large European loach (Misgurnus fossilis).

A fossil rhinoceros with a vertical bony medial septum supporting the nose; the hairy rhinoceros.

An extinct group of Mammalia found fossil in the Eocene formation. The species are related to the carnivores, ungulates, and rodents. Called also Tillodonta.

A wheel-like joint of the stem of a fossil crinoid.

Any fossil coral of the genus Syringopora consisting of a cluster of upright tubes united together by small transverse tubules.

A fossil turbo.

Any fossil ammonite of the genus Turrilites. The shell forms an open spiral with the later whorls separate.

A stone or fossil which has on it impressions or figures of plants and animals.

A genus of fossil trees.

A howitzer. [Obs.] Fossil unicorn, or Fossil unicorn's horn (Med.), a substance formerly of great repute in medicine; -- named from having been supposed to be the bone or the horn of the unicorn. -- Unicorn fish, Unicorn whale (Zoöl.), the narwhal. -- Unicorn moth (Zoöl.), a notodontian moth (Coelodasys unicornis) wh…

Any one of numerous species of siliceous fossil sponges belonging to Ventriculites and allied genera, characteristic of the Cretaceous period.

A genus of brachiopods of which many species are found in the fossil state. A few still exist in the deep sea.

th glochidiate or branched aculei. Several species occur in ditches, and others are found fossil in flint or hornstone.

A fossil cycad of the genus Zamia.