The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 77
... lower canines being maintained by wear against the uppers . Young camels retain the full complement of front teeth , with three incisors and one canine in the upper and lower jaws ; the upper incisors are extremely small . In the upper ...
... lower canines being maintained by wear against the uppers . Young camels retain the full complement of front teeth , with three incisors and one canine in the upper and lower jaws ; the upper incisors are extremely small . In the upper ...
Page 79
... lower premolar , and selenodont molars . A close relative , Agriochoerus , had clawed feet , the func- tion of which remains uncertain . Camelids evolved in North America and , at or toward the end of the Tertiary , spread into South ...
... lower premolar , and selenodont molars . A close relative , Agriochoerus , had clawed feet , the func- tion of which remains uncertain . Camelids evolved in North America and , at or toward the end of the Tertiary , spread into South ...
Page 1061
... Lower Eocene to present ; South America . Ostrich - like cursorial birds with very small tails and no aftershaft on the feathers . Sexes alike . Length 90-130 cm . Order Struthioniformes ( ostrich ) . Lower Pliocene to pres- ent ( the ...
... Lower Eocene to present ; South America . Ostrich - like cursorial birds with very small tails and no aftershaft on the feathers . Sexes alike . Length 90-130 cm . Order Struthioniformes ( ostrich ) . Lower Pliocene to pres- ent ( the ...
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