349. Vorticella Bellis.
V. simplex, hemispherica, margine contractili. Simple, hemispherical, with a margin which it can contract at pleasure.
The body is of a yellow colour, much resembling the flower of a daisy; the head scarcely pellucid; the internal part quite filled; it is abundantly ciliated round the margin, moving in a rotatory manner.
The foot or pedicle is long, slender, and pellucid; it is divided into two parts, with small knobs on the top of each; the base adheres to a bulb, the under-part is covered with small scales.
350. Vorticella Gemella.
V. simplex, sphærica, capitulo gemino. Simple, spherical, with a double head.
The pedicle is long, and constantly furnished with two small heads at its apex; these are bright and clear.
351. Vorticella Pyraria.
The distinguishing characters of this animalculum will be found at [page 400].