NOTES 181 



Bailey, Jacob Whitman, 1808-1857. An American microscopist 

 and professor of chemistry at West Point. 



70. skid. A shoe or clog placed under a wagon wheel to prevent 

 its turning. 



71. Mont Blanc. Literally, "White Mountain." The highest 

 mountain of the Alps; between France and Italy. Height, 15,781 

 feet. 



70. friable. Easily crumbled or pulverized. 



71. filamentous processes. Thread-like projections, 

 amorphous. Formless, unorganized. 



72. Diatomaceae. One-celled water plants. The name is from 

 the Greek, meaning to cut through. See cut in Century Dictionary. 



Radiolaria. From Latin radiolus, a little ray. 



73. Wallich, Dr. Nathaniel, 1 787-1854. A Danish botanist. 

 Sorby, Henry Clifton, 1826-1880, An English geologist. Fellow 



of the Royal Society. 



76. animalcule. A minute or microscopic animal, nearly or quite 

 invisible to the naked eye. 



77. cretaceous. Chalky. 



Sir Charles Lyell. See note, p. 57. 

 Echinus. Sea-urchin. 



80. Hoxne. A division of Suffolk, England. 

 Amiens. An important French town on the Somme. 



syenite. A composite rock, sometimes containing quartz. It is 

 crystalline in texture. Not abundant. 



81. bolls. Trunks. Often spelled boles. 



The Rev. Mr. Gunn. Probably Robert Campbell Gunn, 1808- 

 188 1. A Tasmanian naturalist of British extraction. 



83. Sinai. The mountain on which Moses received the Ten 

 Commandments. Its exact location is unknown. 



Ararat. The peak on which the ark rested after the flood ; about 

 17,000 feet high. 



cogency. Power of producing belief; credibility. 



85. pterodactyl. Flying dragon. 



ichthyosaurus. A gigantic extinct fish-like marine reptile, with 

 an enormous head, no obvious neck, and a tapering body. 



plesiosaurus. An extinct variety of lizard with an extremely 

 long neck. 



ammonites. Fossil shells of extinct cuttle-fish, coiled in a plane 

 spiral. 



belemnites. A straight solid, tapering, dart-shaped fossil. 



Foraminifera. Animals living in chambered shells. The shells 

 are perforated, enabling the animals to send out long thread-like 

 processes, which interlace to form a web. 



