T. sphæroidea, peripheria crinita. Spheroidal trichoda, with a few hairs round the circumference.
The body is orbicular, bright, and filled with globular intestines; in many, a moveable substance, something like the letter S, may be discovered; it has hairs, seldom exceeding seventeen in number, which are disposed round the circumference, each of them nearly equal in length to the diameter of the animalculum.
179. Trichoda Bomba.
T. mutabilis, antice pilis sparsis. [Plate XXV.] Fig. 67 and 68. Changeable, with a few hairs dispersed on the fore-part.
It is a thick animalculum, larger than the trichoda granata, [No. 174], and of a yellow colour; pellucid, and replete with clay-like molecules; it is very lively, moving about with so much velocity, as to elude the sharpest sight and most pertinacious observer, and assuming various shapes, sometimes appearing spherical, sometimes reniform, or kidney-shaped, sometimes as at Fig. 67.
180. Trichoda Orbis.
T. orbicularis, antice emarginata crinita. Orbicular, the fore-part notched and hairy.
It in some, respects resembles the former, but is larger. It is composed of vesicular molecules; is of a spherical figure, smooth, pellucid, and a little notched in the fore-part. The notched part is filled with long hairs, but there are none on the rest of the body.
181. Trichoda Urnula.
T. urceolaris, antice crinita. [Plate XXV.] Fig. 64. This trichoda is in the form of a water pitcher, the fore-part hairy.