GLOSSARY. 385 



FAVO SITES, a genus of fossil corals. 



FERRUGINOUS, containing iron. 



FIRE-CLAY, a common name for the clay beneath the beds of coaL It is very 



seldom suitable for firebrick. 

 FISSILE, easily cleft into thin pieces. 

 FLORA (as used in geology), all the remains of vegetation of a formation, 



group, or system. 

 FLUYATILE, belonging to rivers. 

 FORAMINIFERA, an order of Protozoan shells. 

 FUCOLDES, sea-weeds. 



GANOIDS, an order of fishes. 



GASTEROPODA, a class of mollusks. 



GEODE, a hollow, concretionary, stony mass, lined with crystals. 



GLACIAL, pertaining to glaciers. 



GLACIER, a very slowly moving body of ice upon the earth of great thickness 



and covering a large area. 

 GRIT, coarse sandstone. 



HELODUS, a genus of fossil fishes. 

 HEMIPRONITES, a genus of fossil bivalve shells. 

 HOLOPTYCHIUS, a genus of fossil fishes. 



INOCERAMUS, a genus of fossil bivalve shells. 



IN SITU (Latin), in place, that is, as applied to rocks not disturbed from the 

 position in which they were formed. 



LACUSTRINE, belonging to lakes. 

 LAMELLIBRANCHIATA, a class of moUusks. 

 LAMINATED, composed of very thin layers. 

 LEPIDODENDRON, a genus of fossil trees. 

 LITHOSTROTION, a genus of fossil corals. 

 LINGULA, a genus of bivalve shells. 



MARLITE, marl which has become somewhat stony in character. 



MEEKELLA, a genus of fossils shells. 



METAMORPHIC ROCKS, those which have become much hardened, crysta- 



line, or otherwise much changed from their original texture. 

 MICACEOUS, containing mica. 

 MOLLUSKS, the sub-kingdom of animals which includes all the so-called 



shell fish. 

 MURCHISONIA, a genus of fossil univalve shells. 

 MYALINA, a genus of fossil shells. 



ORACANTHUS, a genus of fossil fishes. 

 ORODUS, a genus of fossil fishes. 

 ORTHIS, a genus of fossil bivalve shells. 



ORTHOCERAS, a genus of fosssl shells related to the nautilus. 

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