344 CLASSIFICATION OF ANIMALS. 



II. Externi. 



1 Aphrodite, sea-mouse 5 Nais 



2 Sipunculus 6 Planaria 



3 flirudo, leech 7 Lumbricus, earth-worm, 



4 Nereis &c. 



The Zoophytes have neither brain nor nerves ; no heart, nor, per- 

 haps, blood-vessels ; no articulated members. 



Order I. Echinodermata ; covered by a hard and tough coriace- 

 ous skin. 



1 Echinus, sea hedgehog 2 Asterias, star-fish, &c. 



II. Soft or Gelatinous Zoophytes. 



1 Medusa, sea-blubber, sea- 2 Actinia, sea-anemony 



nettles 8 Hydra, fresh-water polype 



III. Infusoria ; the animalcules of infusions. 



1 Vorticella, wheel-animal 4 Volvox 



2 Brachionos 5 Monas 



3 Vibrio, eel of vinegar 



IV. Inhabitants of corals, corallines, sponges, &c. 



The coral reefs that surround many islands, particularly those m 

 the Indian Archipelago, and round New Holland, are produced by 

 various tribes of these animals, particularly by the cellepora, isis, 

 madrepora, milepora, and tubipora. The animals form these corals 

 with such rapidity, that enormous masses of them very speedily ap- 

 pear where there were scarcely any marks of such reefs before. 



[Pantologia. 



