File:Image from page 156 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14784651002).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (1,286 × 1,420 pixels, file size: 145 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description

Genus Dero

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


View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.


Text Appearing Before Image: ngs is appropriatelynamed Oligocliceta. The aquatic Oligochaeta2 are among the commonestinhabitants of ponds and ditches, living sometimes in themud and sometimes at the surface of the water. Tubifex3 is common in slow-running brooks, and livesin the mud of the bottom, forming tubes in it. Thethread-like bodies of the worm are stretched up beyondthe surface of the mud and wave in the water in gracefulundulations. Often the worms are so numerous that theirreddish color gives a decided tinge to the bottom. Theythrive well in fresh-water aquaria. 1 Annulus, a little ring. 2 A key for the determination of the principal families of aquatic Oligo-chseta is given in the Appendix to this Chapter, page 144. 3 tubus, tube ; face re, to make. THE EARTHWORM AND ITS ALLIED 137 Dero1 is very common on the surface of ponds, particu-larly in the midst of duck-weed (Lemna), the leaves ofwhich it cements together to form a floating tube in whichit lives, and by which it is accompanied in all its migra-

Text Appearing After Image: Fm. 12o. — Dero, the duck-weed worm. Enlarged. After Reighard. Thelettering is as follows: or., mouth ; phx., pharynx ; oe., oesophagus; ftff. .,segmental organ; in., intestine; pav., pavilion or tunnel; dg. app., finger-like appendages. From Reighard. tions. Dero can also be told by the sort of funnel at thehinder end of the transparent body, from the margins ofwhich finger-like filaments arise which aid in respiration(Fig. 123). Nais2 does not construct tubes, and it has no respiratory , to skin (= flay). 2 PCUS, a water-nymph. 138 ZOOLOGY filament at the hinder end of the body (Fig. 124). It also has eyes; while Dero has none. Both Dero and Nais have the interesting habitof reproducing bydividing the bodytransversely. In themiddle of the bodytentacles begin toarise, a new mouth isformed, and the wormconstricts into two.I n d e e d, sometimesseveral new heads maybe forming in themidst of a singleworm. This habit isof advantage not onlyin multiplying thenumber of individual


Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Source Image from page 156 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900)
Author Internet Archive Book Images
Permission
(Reusing this file)
Internet Archive Book Images @ Flickr Commons

Licensing

[edit]
This image was taken from Flickr's The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as:
  1. The copyright is in the public domain because it has expired;
  2. The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions;
  3. The institution owns the copyright but is not interested in exercising control; or
  4. The institution has legal rights sufficient to authorize others to use the work without restrictions.

More information can be found at https://flickr.com/commons/usage/.


Please add additional copyright tags to this image if more specific information about copyright status can be determined. See Commons:Licensing for more information.
This image was originally posted to Flickr by Internet Archive Book Images at https://www.flickr.com/photos/126377022@N07/14784651002. It was reviewed on 2015-03-26 18:05:25 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.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:09, 26 March 2015Thumbnail for version as of 17:09, 26 March 20151,286 × 1,420 (145 KB)Pixeltoo (talk | contribs)Transferred from Flickr via Flickr2Commons

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file: