GLOSSAKY. 819 



Propolis, — A resinous material collected by the Hive-Bees from the 

 opening buds of various trees. 



Protean.— Exceedingly variable. 



Protozoa.— The lowest great division of the Animal Kingdom. 

 These animals are composed of a gelatinous material, and show- 

 scarcely any trace of distinct organs. The Infusoria, Foramini- 

 fera, and Sponges, with some other forms, belong to this 

 division. 



Pupa (pi. Pup^). — The second stage in the development of an 

 Insect, from which it emerges in the perfect (winged) reproduc- 

 tive form. In most insects the pupal stage is passed in perfect 

 repose. The chrysalis is the pupal state of butterflies. 



Eadicle. — The minute root of an embryo plant. 



Eamus. — One half of the lower jaw in the Mammalia. The portion 

 which rises to articulate with the skull is called the ascending 

 ramus. 



Range. — The extent of country over which a plant or animal is 

 naturally spread. Bamje in time expresses the distribution of a 

 species or group through the fossihferous beds of the earth's 

 crust. 



Eetina. — The delicate inner coat of the eye, formed by nervous 

 filaments spreading from the optic nerve, and serving for the 

 perception of the impressions produced by light. 



Reteogbession. — Backward development. When an animal, as it 

 approaches maturity, becomes less perfectly organised than 

 might be expected from its early stages and known relation- 

 ships, it is said to undergo a retrograde development or meta- 

 morphosis. 



Ehizopods. — A class of lowly organised animals (Protozoa), having a 

 gelatinous body, the surface of which can be protruded in the 

 form of root-like processes or filaments, which serve for loco- 

 motion and the ])rehension of food. The most important order 

 is that of the Foraminifera. 



EoDENTS. — 'I he gnawinj; Mammalia, such as the Eats, Rabbits, and 

 Squirrels. They are especially characterised by the possession 

 of a single pair of chisel-like cutting teeth in each jaw, between 

 which and the grinding teeth there is a great gap. 



EuBUS. — The Bramble Genus. 



EtTDiMENTARY. — Very imperfectly developed. 



Ruminants. — The group of Quadi'upeds which ruminate or chew 

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