GLOSSARY. 



* * Explanations of most of the scientific terms not included in this Glossary, are 

 given in the text, and may be found by consulting the Index. 



Acephala molluscous animals without a head, as the Oyster, 8:c. 



Acicular needle-like, sharp-pointed. 



Aerolites mineral masses that fall from the atmosphere. 



Alg;e a family of marine plants. 



Alluvium water-worn materials. 



Aluminous , clayey. 



Aluminum metallic base of clay. 



Alveola sockets of the teeth. 



Amorphous shapeless; devoid of regular form. 



Amygdaloid cellular volcanic rocks, the cavities of which are filled with 



other substances. 



Anastomosed branching and interlacing. 



Anchylosed joints of bones immoveably united. 



Annelides animals having an external integument formed of rings; 



as the Worm. 



ANTENNiE the feelers of insects. 



Anthozoa animal flowers, as the Actinia. 



Anthracite stone, or cannel coal, or culm. 



Anthracotherium . an extinct animal, allied to the palasotheria, found in 



anthracite. 



Apteryx destitute of wings; applied to a particular genus of bird. 



Arborescent tree-like. 



Arenaceous sandy. 



Argillaceous composed of clay. 



Articulata animals without an internal skeleton, and having jointed 



coverings, as Insects. 



Arundinaceous (arundo, a reed); plants of the reed tribe. 



Ascidian shell-less mollusks, shaped like a bottle. 



Astr^a a genus of corals. 



Augite a dark-green mineral found in many volcanic rocks. 



Aulolepis pipe-scale fish. 



Barytes heavy spar ; a mineral so called. 



Basalt, or Trap ancientlava, composed of augite and felspar; often columnar. 



Basin a series of deposits formed in a depression of older rocks. 



Batrachian animals analogous in structure to the frog; as the Sala- 

 mander. 



Belemnite (from belemnon, a dart,) fossil dorsal bone of an extinct 



genus of cuttle-fish. 

 VOL. II. 3 o 



