GLOSSARY 321 



CoNFERV-S;. — The filamentous weeds of fresh water. 



Conglomerate, — A rock made uj) of fragments of rock or 

 pebbles, cemented together by some other material. 



Corolla. — The second envelope of a flower, usually com- 

 posed of colored, leaf-like organs (petals), which may 

 be united by their edges either in the basal part or 

 throughout. 



Correlation. — The normal coincidence of one phenome- 

 non, character, etc., with another. 



Corymb. — A bunch of flowers in which those springing 

 from the lower part of the flower stalk are supported on 

 long stalks so as to be nearly on a level with the upper 

 ones. 



Cotyledons. — The first or seed-leaves of plants. 



Crustaceans. — A class of articulated animals, having the 

 akin of the body generally more or less hardened by the 

 deposition of calcareous matter, breathing by means of 

 gills. {Examples, Crab, Lobster, Shrimp, etc.) 



Curculio. — The old generic term for the Beetles known as 

 Weevils, characterized by their four-jointed feet, and 

 by the head being produced into a sort of beak, upon the 

 sides of which the antennae are inserted. 



Cutaneous. — Of or belonging to the skin. 



Degradation. — The wearing down of land by the action of 

 the sea or of meteoric agencies. 



Denudation. — The wearing away of the surface of the 

 land by water. 



Devonian System or formation. — A series of Paleozoic 

 rocks, including the Old Red Sandstone. 



Dicotyledons or Dicotyledonous Plants. — A class of 

 plants characterized by having two seed-leaves, by the 

 formation of new wood between the bark and the old 

 wood (exogenous growth), and by the reticulation of 

 the veins of the leaves. The parts of the flowers are 

 generally in multiples of five. 



Differentiation. — The separation or discrimination of 



