Fichier:Image from page 225 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14785036265).jpg
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DescriptionImage from page 225 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14785036265).jpg |
Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing After Image: FIG. 102. — Sycon gelatinosum. A portion slightly magnified: one cylinder(that to the right) bisected longitudinally to show the central stomachcavity opening on the exterior by the osculum, and the position of the incur-rent and radial canals; the former indicated by the black bands, the latterdotted, ip marks the position of three of the groups of inhalant pores atthe outer ends of the incurrent canals; o, osculum. When stimulated by contact with some foreign body thetentacle closes around it, while from each capsule thelasso-thread rolls out as the finger of a glove is rolledinside out, and discharges the irritating poison .through THE HYDRA AND ITS ALLIES 207 the lumen of the thread. If a small animal has been theirritant, it is instantly caught in the thread, paralyzed bythe poison, and soon conveyed to the Hydras mouth.The principal food of Hydra is small worms and thesmaller Crustacea, such as Daphnia and Cyclops. a
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Source | Image from page 225 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) |
Auteur | Internet Archive Book Images |
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Internet Archive Book Images @ Flickr Commons |
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This image was originally posted to Flickr by Internet Archive Book Images at https://www.flickr.com/photos/126377022@N07/14785036265. It was reviewed on 2015-03-26 18:03:42 by FlickreviewR, who found it to be licensed under the terms of the No known copyright restrictions, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid. |
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