377. Brachionus Patulus.
B. capsularis, testa ventrosa, apice octodentata, basi lunata quadricorni, cauda brevi bicuspi. Capsular brachionus, the shell ventricose, eight teeth at the apex, the base lunated or hollowed into the form of a crescent, and furnished with four horns; the tail short, with two small points at the end.
ADDITIONAL ANIMALCULA INFUSORIA, EXHIBITED IN PLATE XXVI.
378. Fig. A A A. An animalculum found in ditch water in the month of September, represented in three different forms which it assumed.
379. Fig. B B B. A species of testaceous wheel-animal; a, its appearance when protruded; b, when in the shell; c, another appearance of the same.
380. Fig. C, shews one of the same species; and
381. Fig. D, exhibits another of the same kind; they both appear as protruded from the shell. The above are all drawn as they were found adhering to a vegetable substance.
382. Fig. E E E. Several appearances of an animalculum found in stagnant water in September, about the one-hundredth part of an inch in length; it moved slowly, and there appeared a wheel-like motion in certain fibrillæ in the head. The double-forked part of the tail had a similar motion to the tail of the pulex aquaticus; the intestines appeared of different colours, as brown, yellow, and reddish, and had a quick irregular motion; the external parts were very transparent.
383. Fig. F F F F. Several animalcula in a drop of water from a leaden cistern; of different sizes, but apparently of the same species. They moved either end foremost, without any undulating motion, but very uniform and slow; each end appeared alike, and very transparent; the middle clear, brown, with a blackish list nearly the whole length of the animal. The large one, a, lay sometime bent, as in the drawing, the others, both when in motion and at rest continuing quite straight. Some of the very small ones were transparent; others appeared as at b and c.[128]
[128] In the former edition of this work, owing to an error in the numeration, it appeared that 379 of these animalcula were described, though in reality it contained only 377, or the number which has already been given.