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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f insects andworms. It does not arrive at its full size till atleast five years old, and is supposed to live aboutfifteen. The Frog which is so frequently eaten inmany parts of the Continent is a different species,rather larger and of a greener colour, spottedwith black, and with two pale yellow lines downthe back. Those however who collect the Frogsfor the purpose of the table are known not to bevery scrupulous in their choice, and it is acknow-ledged that not only Common Frogs but evenToads also are often intermixed with the greenones. Such animals of this genus as are of a heavieror thicker form than the rest, with shorter limbs,and which rather crawl than spring, are calledToads. Of these the Rana Bufo or CommonToad is the principal European species. Itschanges are similar to those of the Frog, butthe eggs from which its tadpoles proceed are notdeposited in the form. of clustered heaps, but inthat of long double strings, bearing the appearance of so many necklaces. The Common Toad
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LECTURE VII. 25 is a perfectly innocent animal, and the tales re-lative to its supposed venom are now pretty wellexploded. There are however some exotic spe-cies of Toad, which exsude a highly acrimoniousand offensive moisture from their skin, and whichis said to be of a corrosive or hurtful nature. In South-America is produced a highly sin*gular species of Toad, called the Pipa or Toad ofSurinam. It is of large size, with a flattened andsomewhat triangular head, and with all the toesof the fore-feet regularly divided into four partsat the tip; the hind-feet being widely webbed.The young are produced, not in the usual man-ner, but from numerous cells on the back of theanimal. It appears however on accurate exa-mination, that even there they have undergonethe general change from the tadpole to the com=plete animal, several having been observed in theform of tadpoles in the cells themselves. Before we leave the Frog tribe we should par-ticularize what has been sometimes called theFrog-F

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