GLOSSARY. 



Abranchiate — Without branchiae, or gills. 



AcALEPHiE — Jellyfish. 



Action— A shell-less Mollusc, one of the " sea slugs." 



Actinia — The Sea Anemone. So called from the i-ay-like disposition 

 of its arms or tentacles. 



Amceba — A microscopic animalcule, of jelly-like substance, without 

 organs, without even constant form. 



Anastomose — When the mouths of two vessels unite and blend to- 

 gether, forming one continuous vessel, they are said to anastomose. 



Annelid — Almost all worms are composed of a succession of rings or 

 segments; hence they are included under the term Annulata or 

 An7ielida. 



Anthea — A species of Sea Anemone. 



Aplysia — A gasteropodous Mollusc, popularly called the Sea-Hare 

 (Plate II. fig. 3.) 



Arborescent — Branched like a tree. 



AsciDlAN — A Mollusc, without head or shell, having two orifices nearly 

 on a level, and shaped like a leathern bottle (askos is the Greek for 

 flask). See Frontispiece, fig. 4. The Ascidians are also found living 

 in colonies. Hence there are Solitary Ascidians and Compound 

 Ascidians. 



Aurora — A species of Sea Anemone, orange-ten tacled. 



Automatic — Actions are said to be automatic when they occur with- 

 out the intervention of the will — e. g. the heart acts automatically ; 

 we breathe automatically. 



Balani — The Balanus is one of the fixed Cirripeds. It is not a " shell- 

 fish " — i. e. a Mollusc — in spite of its resemblance to one. The rocks 

 are often covered with their small flat and conical shells. They are 

 also found on the shells of the Whelk and other molluscs. 



Biology — The Science of Life, including Botany, Zoology, Physiology, 

 and Anatomy, which are the branches of this general subject. 



Bivalve — Molluscs which have two shells closing together are called 

 Bivalves — e. g. the Mussel or the Oyster. 



