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Sewellels
The sewellels are peculiarly isolated animals, having no close affinity with any other existing rodents, but constituting one of those interesting "connecting links" that have been preserved from some former geological age. They are allied to the squirrel and marmot tribe and come perhaps nearer to the beaver than anything else in their skeletal peculiarities. They have extremely broad flat skulls, thick clumsy bodies, with practically no neck, short ears and very short tail.