INFUSORIA. 
571 
Section II.— Vibiiatiles. 
With the dike near the mouth moving in interrupted vibra¬ 
tions.—The genera are, 7. Vaginicola ; 8. Trichocerca ; and, 9. 
Rattulus. 
CLASS XV.—INFUSORIA. 
Microscopic, gelatinous, transparent, polymorphous, and con¬ 
tractile animals ; without any distinct mouth, or constant, de¬ 
terminable, interior organ ; generation supposed fissiparous or 
gemmiparous. 
These animals exist in the infusions of various plants 
in water, in a state of putrefaction. Their organization, as far 
as has yet been ascertained, justly entitles them to rank at the 
termination of the scale of animal existence. They are so mi¬ 
nute, that they cannot be discovered without the aid of a power¬ 
ful lens. 
Lamarck has divided this class into two orders :—I. Infu¬ 
soria Appendiculata • and, II. Infusoria Nuda, or naked 
infusory animals. 
ORDER I_INFUSORIA APPENDICULATA. 
With projections at the exterior of the body, such as hairs ; 
a sort of horns or a tail.—The genera of this order are, 1. Furc- 
ocerca; 2. Cercaria; 3. Kerona ; and, 
Genus 4.—TRICHODA— Lamarck. 
Generic Character. —With a very small, transparent, diversi¬ 
form body, without any particular tail, and provided with soft 
hair over all, or part of the surface. 
ORDER II—INFUSORIA NUDA. 
Body extremely simple, devoid of organs or exterior appen¬ 
dages, and appearing homogeneous. 
