40 GLASSES. 
their motions consist in various curvilinear con- 
tractions, contortions and elongations. 
Examples. Snail, slug, oyster, clam. 
RADIATED ANIMALS 
ARE DIVIDED INTO FIVE CLASSES. 
10. EcHINODERMA, spine covered animals. They 
have intestinal organs of respiration and for a par- 
tial circulation. 
Their organized structure is more complicated 
than that of any other class of this division. 
Kxamples. Sea-star or star fish, sea-hedgehog. 
41, Inrestina, animals inhabiting the bodies of 
other animals. "They have no discoverable organs 
for respiration or for circulation. 
They are generally oval, long, terete or com- 
pressed ; with their orgaus longitudinally ar- 
ranged. Some have an intestinal canal, others 
have none. ‘They generally inhabit the intes- 
tines,* glands, or cellular integuments of other 
animals. 
Examples. 'Tape-worm, hydatids. 
12. AcaLepna, circular radiated animals, with. 
out organs of respiration ag circulation. 
They are the largest of “the Zophytes. They 
differ from the class Polypi by the developement 
of the tissue of their organs. 
Examples. Sea-anemone, zoanthus, kraken ? 
13. Po.ypi, small gelatinous animals with mouths 
surrounded by tentacule. The conducting tube, 
passing into the stomach, simple or passing down in 
the form of vessels. 

* Cuvier says, the most efficacious vermifuge is animal oil mixed 
with oil ef turpentine. 
