toxoceras

[Gr. toxon =a bow, and keras =a horn.] Palæont.: A genus of Ammon i tide, having the shell simply arcuate or bent like a horn. Twenty species, ranging from the Lower Oõlites to the Gault, but the genus is characteristically Cretaceous. IMG:content-1282.png:[blocks in formation] tox-o-don, subst. [Gr. toxon a bow, and odous ( gen it.odontos )=a tooth.] Palæont .: A genus of Owen's Toxodontia (q. v.). They were about the size of a Hippopotamus; the teeth consist of large incisors, very small lower canines, and strongly-curved molars, all with persistent roots. According to Cope, the tarsal bones more nearly resemble those of the Proboscidea than any other known Ungulates. The genus was discovered by Darwin, and many specimens have since been found in Pleistocene deposits near Buenos Ayres, and have been described by Owen, Gervais, and Bur meister. pine, pit, sire, sir, marine; gō, pot, toxodontia