Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/22



HABITS OF WORMS.

are distributed throughout the world under the form of a few genera, which externally are closely similar to one another. The British species of Lumbricus have never been carefully monographed; but we may judge of their probable number from those inhabiting neighbouring countries. In Scandinavia there are eight species, according to