GLOSSAEY. 



which descends from the brain through the arches of the vertebra?, and 



gives off nearly all the nerves to the various organs of the body. 

 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 fecundating dust, is 



formed. 



STERNUM. The breast-bone. 



STIGMA. The apical portion of the pistil in flowering plants. 

 STIPULES. 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. 

 SUBCUTANEOUS. Situated beneath the skin 

 SUCTORIAL. Adapted for sucking. 

 SUTURES (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 fleshy organs of prehension or touch 

 possessed by many of the lower animals. 



TERTIARY. The latest geological epoch, immediately preceding the establish- 

 ment 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. 



TRILOBITES. A peculiar group of extinct Crustaceans, somewhat resembling 

 the Woodlice 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 abundantly in those of Silurian age. 



TRIMORPHIC. Presenting three distinct forms. 



UMBELLIFER^. 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.) 



UNOULATA. Hoofed quadrupeds. 



UNICELLULAR. Consisting of a single cell. 



VASCULAR. Containing blood-vessels. 



VERMIFORM. Like a worm. 



VERTEBRATA ; 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 vertebrae, which constitutes the centre of the skeleton 

 and at the same time supports and protects the central parts of the nervous 

 system. 



WHORLS. The circles or spiral lines in which the parts of plants are arranged 



upon the axis of growth. 

 WORKERS. See Neuters. 



ZOBA-STAGE. The earliest stage in the development of many of the higher 

 Crustacea, so called from the name of Zoea applied to these young animals 

 when they were supposed to constitute a peculiar genus. 



