File:Image from page 232 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14598340930).jpg
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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: nlc FIG. 201.—Halistemma terge-stinum. The entire colony.cw, coenosarc; dz, dactylo-zooid ; hph, hydrophyllium or bract; net, nectocalyx or swimming-bell; ntc, battery of nematocysts;p, polyp; pn, pneumatophore or float; t,tentacle. After Glaus. 214 ZOOLOGY warv (Physalia,1 Fig. 192), which often swarms in theGulf Stream. The huge float which lies on the surfaceof the water serves also as a sail by which the animal istransported by the wind. There are other smaller, moregraceful species of more typical form (Fig. 201). Thestructure of a siphonophore is very complex. From thefloat hangs a central stem. Upon this stem are buddedfeeding zooids — hydranth-like forms provided with mouthand tentacles — and reproductive zooids- - gonophore-likeforms which produce the germ cells. There are leaf -likeexpansions also, which are rudimentary medusae. All themany forms budded on the stem are modifications of thehydroid type. Contrasted with the Hydrozoa are the Scyphozoa,2 whichare, on the w
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| Source | Image from page 232 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) |
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This image was originally posted to Flickr by Internet Archive Book Images at https://www.flickr.com/photos/126377022@N07/14598340930. It was reviewed on 2015-03-26 17:57:36 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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