The microscope and its revelations . ey sprang; but the process has not yet beenthoroughly raade-out. This is obviously not the true Genera-tion of the plant, but is analogous to the development ofzoospores in Aclilya (§197). It is not a little curious,moreover, that the Entozoa or parasitic worms infesting thealimentary canal of these animals, should be frequently clothedexternally with an abundant growth of such plants; in oneinstance Dr. Leidy found an Ascaris bearing twenty-threefilaments of Ihiterobryus which appeared to cause no incon-venience to the animal, as it moved and wriggled-abou
The microscope and its revelations . ey sprang; but the process has not yet beenthoroughly raade-out. This is obviously not the true Genera-tion of the plant, but is analogous to the development ofzoospores in Aclilya (§197). It is not a little curious,moreover, that the Entozoa or parasitic worms infesting thealimentary canal of these animals, should be frequently clothedexternally with an abundant growth of such plants; in oneinstance Dr. Leidy found an Ascaris bearing twenty-threefilaments of Ihiterobryus which appeared to cause no incon-venience to the animal, as it moved and wriggled-about withall the ordinary activity of the species. The presence of thiskind of vegetation seems to be related to the peculiar food ofthe animals in whose stomachs it is found; for Dr. Leidycould not discover a trace of these or of any other parasiticplants in the alimentary canal of the carnkorons Myiiapodswhich he examined; whilst he met with a constant and mostextraordtaary profusion of vegetation (Fig. 123) in the stomach Fig. Fungoid Vegetation, clothing membrane of stomach of Fassulus,intermingled with brush-like hairs. 382 MICROSCOPIC STRUCTURE OF HIGHER CRYPTOGAMIA. of a herbivorous beetle, the Passulus cornzitus, which lives, likethe luli, in stumps of old trees, and feeds as they do ondecaying wood. Of this vegetation, some parts present them-selves in tolerably definite forms, which have been describedunder various names; whilst other portions have the indefinite-ness of imperfectly-developed organisms, and can scarcely becharacterized in the present state of our knowledge of regard to several forms, indeed. Dr. Leidy expresses adoubt whether they aie parasitic plants, or whether they areoutgrowths of the membrane itself.—There are variousdiseased conditions of the Human skin and mucous membranes,in which there is a combination of fungoid vegetation andmorbid growth of the animal tissues; this is the case, forexample, with the Tinea favosa, a disease o
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