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<p>darwin, c. r. 1853. [description of patagonian fossil beds.] in owen, r., description of some species of the extinct genus nesodon, with remarks on the primary group (toxodontia) of hoofed quadrupeds, to which that genus is referable. [read 25 november 1852 and 13 january 1853] philosophical transactions of the royal society 143: 309.
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