File:Zoological lectures delivered at the Royal Institution in the years 1806 and 1807 (1809) (14775362041).jpg

Identifier: zoologicallectur21809shaw (find matches)
Title: Zoological lectures delivered at the Royal Institution in the years 1806 and 1807
Year: 1809 (1800s)
Authors: Shaw, George, 1751-1813 Mearns, Edgar Alexander, 1856-1916, former owner. DSI Royal Institution of Great Britain
Subjects: Zoology
Publisher: London : Printed for George Kearsley, by Thomas Davison
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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ana temporaria of Linnaeus, which is ahiiostevery where seen in moist situations, where itcan command a sufficient quantity of insects andsmall worms, whicli are its favourite food. Asa species the Common Frog is distinguished byits yellowish-brown colour, spotted with blackyand by a lengthened brown patch or streak be-neath each eye. It often however varies in co-lour, running through all the shades of olive, and•^sojnetimes even of reddish brown. The form ofthe common Frog is light and elegant; the limbsfinely calculated for the peculiar motions of theanimal, and the hind feet strongly webbed, taassist its progress in the water, to which it oc-casionally retires during the heats of summer, andagain during the frosts of winter, when it lies in a*state of torpidity either plunged in the soft mudat the bottom of stagnant waters, or in the hol-lows beneath their banks, till it is awakened fromits slumbers by the return of Spring. In themonth of March it deposits its eggs, in large ^ o
Text Appearing After Image:
^5! LECTURE VII. 2S groupes or clustered masses; each e>gg being ofa gelatinous substance, perfectly transparent, andcontaining the young animal in its centre underthe form of a round black globule. In the spaceof about a month the globule assumes an ovalshape, and soon after hatches ; not in the form ofa complete Frog but of what is termed a tad-pole, and appearing, on a general view, to con-sist merely of head and. tail 3 the former blackand large, the latter slender, and bordered witha transparent finny margin. The motions of thetadpoles are very lively, and in the advanced stateof Spring are so plentiful that the waters theyinhabit appear blackened by their numbers. Theylive; on the leaves of the plant called duckweedand On other small vegetable substances: duringthe early part of their growth they are furnishedon each side the head with a pair of ramifiedbreathing organs, which drop off when they arefarther advanced in age; and when they havearrived at the age of five or six w

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