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and a large family of mosses which send their fruit-bearing 

 organs from the sides of their stems instead of from their 

 points are pleuvocavpous. 



Aero (from Greek, a point), when it begins a word, in 

 distinction from pleuro, implies that not the side, but the 

 point of the object described is concerned. In mosses we 

 have acrocarpous, as denoting those which bear their fruit at 

 the tip of the stem, and not at its sides. Aero, like pleuro, 

 occurs as the first part of many words in use in botany and 

 other branches of natural history, and both should be care- 

 fully kept in mind. 



Chevron (French for a rafter). To be chevvoned is to have 

 angles meeting at the top like the rafters in a gabled roof, or 

 like the teeth of a saw. The word is used in reference to 

 ornamental patterns on pottery, to arrangements in archi- 

 tecture, and to certain triangular bones. 



Herring-bone pattern is a term applied to lines when 

 arranged like the side bones on the spinal column of a 

 herring. 



Incisor means cutting or biting, and is applied to the front 

 teeth. 



Canine means dog-teeth or prey-seizing teeth, and is 

 applied to the " eye teeth," 



Molar means grinding, or masticating, and is applied to 

 the back teeth (or " cheek teeth.") 



Late Keltic Period. — The five hundred years of British 

 history which preceded the Roman occupation. It was 

 during this period that Caesar's incursion took place. The 

 period begins with the general use of iron, which was 

 coincident with the arrival of the Brythonic kelts. Thus 

 "Late keltic" is almost equivalent to "Brythonic keltic," 

 and is applicable to the " Early Britons " of druidic times. 



The Bronze Age. — The period of time or stage of civilisa- 

 tion during which bronze was the metal chiefly in use. It 

 followed the Stone Age and preceded that in which iron was 

 employed, but it must be understood that it began by degrees 



