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fossil in the Eocene formation. The species are related to the carnivores, ungulates, and rodents. Called also Tillodonta.

d curved and provided with a persistent pulp. They are supposed to be related both to the rodents and ungulates. Called also Toxodontia.

so coendou. -- Tree rat (Zoöl.), any one of several species of large ratlike West Indian rodents belonging to the genera Capromys and Plagiodon. They are allied to the porcupines. -- Tree serpent (Zoöl.), a tree snake. -- Tree shrike (Zoöl.), a bush shrike. -- Tree snake (Zoöl.), any one of numerous species of snak…

A burrowing South American rodent (Ctenomys Braziliensis). It has small eyes and ears and a short tail. It resembles the pocket gopher in size, form, and habits, but is more nearly allied to the porcupines. [Written also tucu-tuco.]

Any species of large West Indian rodents of the genus Capromys, or Utia. In general appearance and habits they resemble rats, but they are as large as rabbits.

A large burrowing South American rodent (Lagostomus trichodactylus) allied to the chinchillas, but much larger. Its fur is soft and rather long, mottled gray above, white or yellowish white beneath. There is a white band across the muzzle, and a dark band on each cheek. It inhabits grassy plains, and is noted for its e…

Any one of numerous species of micelike rodents belonging to Arvicola and allied genera of the subfamily Arvicolinæ. They have a thick head, short ears, and a short hairy tail.

They live on the borders of streams, and swim well. They are remarkable as being the only rodents found in Australia.

An Asiatic burrowing rodent (Siphneus aspalax) resembling the mole rat. It is native of the Altai Mountains.