ENTOZOA. 
.55 L 
Genus 10.—A PL I L)I UM.— Lamarck. 
Generic Character .—Biferous animals very small, living in a 
common, fleshy, convex body, fixed, and not discovering any 
particular system ; mouth with six tentacula; no apparent ex¬ 
ternal anal orifice. 
CLASS XII.—ENTOZOA. 
Body soft, naked, and elongated ; destitute of a distinct head, 
eyes, or feet; mouth formed of one or many suckers ; no tenta¬ 
cula or organs of respiration ; intestinal canal scarcely percepti¬ 
ble in some species. 
ORDER L—ELMINTHOGAMA. 
Worms which usually live on the exterior of aquatic animals, 
or in the interior parts of others, with a mouth and a vent, and 
the sexual organs separate; nervous filaments in some, emerging 
from near the opening of the oesophagus. 
TRIBE I.-ENTOMOIDA. 
Worms living on the exterior of aquatic animals, furnished 
with feet-like appendages for locomotion ; the bodies of the fe¬ 
males posteriorly terminated by two ovaries. 
Genus PLANARIZE.— Ease. 
Generic Character .—Body oblong, depressed, semigelatinous, 
capable of great contraction, usually simple, sometimes ante¬ 
riorly provided with two auricular appendages ; belly with two 
openings. 
TRIBE II.-LUMBRICOIDA. 
Worms which exist in the interior of the bodies of other ani¬ 
mals ; and are devoid of any appendages resembling antennae or 
feet. 
Genus FILARIA.— Linnceus. 
Generic Character .—Body long and round, elastic, and nearly 
