518 GLOSSARY. 



Stamens. — -The male organs of flowering plants, standing in a circle 

 within the petals. They usually consist of a filament and an 

 anther, the anther being the essential part in which the pollen, 

 or fecandating dust, is formed. 



Sternum. — The breast-bone. 



Stigma. — The apical portion of the pistil in flowering plants. 



STiPniiES. — Small leafy organs placed at the base of the footstalks of 

 the leaves in many plants. 



Style. — The middle portion of the perfect pistil, which rises like a 

 column from the ovary and supports the stigma at its summit. 



Stxbcutaneocs. — Situated beneath the skin. 



Sdctobial. — Adapted for sucking. 



SuTUEBS (in the skull). — The lines of junction of the bones of which 

 the skull is composed. 



Tarsus (pi. Tarsi). — The jointed feet of articulate animals, such as 

 Insects. 



Teleostean Fishes. — Fishes of the kind familiar to us in the 

 present day, having the skeleton usually completely ossified and 

 the scales horny. 



Tentacula or Tentacles. — Delicate fieshy organs of prehension 

 or touch possessed by many of the lower animals. 



Tertiary. — The latest geological epoch, immediately preceeding the 

 establishment of the present order of things. 



Trachea. — The windpipe or passage for the admission of air to the 

 lungs. 



Tridactyle. — Three-fingered, or composed of three movable parts 

 attached to a common base. 



Trilobitks. — A peculiar group of extinct Crustaceans, somewhat 

 resembling the Wood-lice in external form, and, like some of 

 them, capable of rolling themselves up into a ball. Their 

 remains are found only in the Palaeozoic rocks, and most abund- 

 antly in those of Silurian age. 



Trimorphic. — Presenting three distinct forms. 



Umbelliper^. — An order of plants in which the flowers, which 

 contain five stamens and a pistil with two styles, are supported 

 upon footstalks which spring from the top of the flower stem 

 and spread out like the wires of an umbrella, so as to bring all 

 the flowers in the same head (umbel) nearly to the same leveL 

 {Examples, Parsley and Carrot.) 



Ungulata. — Hoofed quadrupeds. 



Unicellular. — Consisting of a single cell. 



Vascular. — Containing blood-vessels. 



Vermiform. — Like a worm. 



Vbrtbbrata; or Vertebrate Animals. — The highest division of 

 the animal kingdom, so called from the presence in most cases of 

 a backbone composed of numerous joints or nertehrcB, which con- 

 stitutes the center of the skeleton and at the same time supports 

 and protects the central parts of the nervous system. 



