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Family Corixidae: WATER BOATMAN, the name given to aquatic bugs of the family Corixidae. They receive the name because the hind legs are very long and famished with swimming hairs and are used in a manner resembling the motion of oars on a row-boat. They swim with a short, jerky motion. The body is flattened dorsoventrally and the head is bluntly convex in front; the small, three- or four-segmented antennae are concealed in a recess between the head and the thorax.
The post of shogun was inherited by ;mbers of the Minamoto family until the OOs, when the Ashikaga family took over. his family ruled until the 1600s, when the akugawa family assumed the shogunate. , 1868 the last Tokugawa shogun was reed by a court revolution to hand his >wers back to the emperor.
Almost one fourth of the earth's vegetation cover is in grasslands—the great prairies and plains of North America, the extensive pampas of South America, the steppes of Asia, and the velds of Africa. At least 7,000 species of grasses are known. The grass family (Gramineae) is outranked in number of species only by four other families-the bean family (Leguminosae), daisy family (Compositae), coffee family (Rubiaceae) and orchid family (Orchidaceae). But in numbers of individual plants spread over the globe, the grasses are unsurpassed. They have a wider range than any other plant family except for lichens and algae. |
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