K. crassa medio sinuata. This kolpoda is thick, and carved in the middle.
The body is yellow, thick, and rather opake; curved a little, in the middle, so as to have the appearance of a kidney; the whole body is filled with molecules. Its motion is quick, fluctuating, and interrupted. When the water in which it swims is about to fail, it assumes an oval form, is compressed, and at last bursts. It is found in an infusion of hay, generally about thirteen hours after the infusion is made.
112. Kolpoda Pirum.
K. convexa, ovalis, apice in rostrum producta. [Plate XXV.] Fig. 20 and 21. Convex kolpoda, oval, the apex formed into a kind of beak.
The body is uniform and transparent, without any sensible inequality; the neck rather long and a little bent; it is of a pale colour, and furnished with obscure little globules. It propagates by division. Fig. 20 represents this animalculum; Fig. 21, the same dividing to form another; a, the fore-part; b, the hind-part; c, where it is dividing.
113. Kolpoda Cuneus.
K. clavata, teres, apice dentata. Clavated kolpoda, round, the apex dentated.
This is a large animalculum, the body white, gelatinous, without any distinct viscera. It has a pellucid, bright, striated pustule on one side of the fore-part; the apex is distinguished by three or four teeth, the hinder-part is smaller than the fore-part, with an obtuse termination, which it can bend into a spiral form.
IX. GONIUM.
Vermis inconspicuus, simplicissimus, complanatus, angulatus. An invisible, simple, smooth, angular worm.