so many thousand stars, which were before
invisible, by improvements of the telescope.

Mr. Muller's classes consist of

I. _Such as have no External Organs._

1. Monas: Punctiformis. A mere point.
2. Proteus: Mutabilis. Mutable.
3. Volvox: Sphaericum. Spherical.
4. Enchelis: Cylindracea. Cylindrical.
5. Vibrio: Elongatum. Long.

*Membranaceous.

6. Cyclidium: Ovale. Oval.
7. Paramecium: Oblongum. Oblong.
8. Kolpoda: Sinuatum. Sinuous.
9. Gonium: Angulatum. With angles.
10. Bursaria. Hollow like a purse.

II. _Those that have External Organs._

*Naked, or not enclosed in a shell.

1. Cercaria: Caudatum. With a tail.
2. Trichoda: Crinitum. Hairy.
3. Kerona: Corniculatum. With horns.
4. Himantopus: Cirratum. Cirrated.
5. Leucophra: Ciliatum undique. Every part ciliated.
6. Vorticella: Ciliatum apice. The apex ciliated.

*Covered with a shell.

7. Brachionus: Ciliatum apice. The apex ciliated.

1. These animalcules are discovered in two or three days in all
decompositions of organic matter, whether vegetable or animal, in
moderate degrees of warmth with sufficient moisture.

2. They appear to enlarge in a few days, and some to change their
form; which are probably converted from more simple into more
complicate animalcules by repeated reproductions. See Note VIII.

3. In their early state they seem to multiply by viviparous solitary
reproduction, either by external division, as the smaller ones, or by
an internal progeny, as the eels in paste or vinegar; and lastly, in
their more mature state, the larger ones are said to appear to have
sexual connexion. Engl. Encyclop.

4. Those animalcules discovered in pustules of the itch, in the feces
of dysenteric patients, and in semine masculino, I suppose to be
produced by the stagnation and incipient decomposition of those
materials in their receptacles, and not to exist in the living blood
or recent secretions; as none, I believe, have been discovered in
blood when first drawn from the arm, or in fluids newly secreted from
the glands, which have not previously stagnated in their reservoirs.

5. They are observed to move in all directions with ease and rapidity,
and to avoid obstacles, and not to interfere with each other in their
motions. When the water is in part evaporated, they are seen to flock
towards the remaining part, and show great agitation. They sustain a
great degree of cold, as some insects, and perish