Both extremities of the body are raised, so that the bottom becomes convex, and the upper part depressed like a boat. It varies in shape at different ages, and sometimes has a rotatory motion. It is found in an infusion of old grass.
218. Trichoda Paxillus.
T. linearis depressa, antice truncata crinitaque, postice obtusa. Linear flat trichoda, the fore-part truncated and hairy, the hinder-part obtuse.
A long animalculum, full of grey molecules; the fore-part rather smaller than the hind-part, and furnished with minute hairs. It was found in salt water.
219. Trichoda Vermicularis.
T. elongata, cylindracea, collo brevi, apice crinito. [Plate XXVII.] Fig. 1. Long cylindrical trichoda, with a short neck, the apex hairy.
Gelatinous, the fore-part pellucid, the hind-part full of molecules. It was found in river water. It is represented in different appearances in the figure; a, the neck; b, the hairs; c, a little vesicle in the hinder-part.
220. Trichoda Melitœa.
T. oblonga, ciliata, colli dilatabilis, apice globoso, pilifero. [Plate XXVII.] Fig. 3. Oblong ciliated trichoda, with a dilatable neck, the apex globular, and surrounded with hairs, the edge is ciliated, and a kind of peristaltic motion perceivable in it. It is found, in salt water, though but very rarely. a, the neck; b, the globular apex; c, the body ciliated.