Glossary. 
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Batrachia (G-r. batraclios , a frog). Often loosely applied 
to any of the Amphibia, but sometimes restricted to 
the order embracing frogs and toads. 
Bivalve (Lat. bis , twice ; valves, folding-doors). Composed 
of two plates or valves ; applied to the shell of the 
Lamellibranchiata and Brachiopoda, and to the cara- 
pace of certain Crustacea. 
Brachiopoda ( Gr. brachion , an arm ; pous, a foot). A 
class of the Molluseoida, often called “ Lamp-shells, ” 
characterised by possessing two fleshy arms, continued 
from the sides of the mouth. The Terebratula of 
Sydney Harbour is an example. 
Branchia (Gr. branchion , the gill of a fish). The respiratory 
organs, called gills, adapted to breathe air dissolved in 
water. 
Breccia (It. breccia , a crumb). Angular, irregular, not 
water- worn f ragmen ts. 
Bronteus (Gr. bronte , thunder — an epithet of Jupiter the 
Thunderer). A genus of Trilobites. 
Calamites (Lat. calamus , a reed). Extinct plants with 
reed-like stems, believed to be gigantic representatives 
of the Equisetaceze. 
Calcareous (Lat. calx , lime). Composed of carbonate of 
lime. 
Calymene (Gr. kalummene , concealed). A genus of Trilo- 
bites. 
Caudal (Lat. cauda, the tail) Belonging to the tail. 
Cainozoic (Gr. Jcainos, recent ; zoe , life). The Tertiary 
period in Geology, comprising those formations in 
which the organic remains approximate more or less 
closely to the existing fauna and flora. 
