Galls that appear on the roots of the Clematis, much resembling those which appear on the roots of grapes attacked by the phylloxera, are well-known enemies to cultivators of the Clematis. Prof. William Trelease has examined critically these galls, and contributes to the Country Gentleman a very interesting account of what he finds. He finds the galls are formed by worms that belong to the group Nematodes, and similar to the Trichinia found in pork. A number are known as parasites on the roots of plants, just as others are parasitic in flesh of animals.