File:Image from page 148 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14782646344).jpg

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

Original file ‎(1,018 × 584 pixels, file size: 131 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description

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: FIG. 119. — Acartia, a marine Copopod. Greatly magnified. Photo, by W. H. C. P. Of the Copepoda1 the commonest fresh-water genus isCyclops, which occurs in a similar habitat witli Daphniaand is sometimes found even in pure drinking water.The female carries a conspicuous egg-sac on each side of theabdomen, and reproduction occurs with such rapidity that oar ; Trews, foot. THE DAPJfNTA AND TTS ALL1KS 129 one Cyclops might, under the most favorable conditions,have 5,000,000,000 descendants in one year. It is conse-quently easy to understand how Cyclops often becomesthe most abundant eiitomostracan in our waters, and howin some lakes it has been found that there are over onemillion of them to each square metre of water surface.Large numbers of the Copepoda are marine. One of themost common is Acartia (Fig. 119), which swarms to such

Text Appearing After Image: FIG. 120. — Mussel-shell bearing barnacles (Balauus). Photo, by W. H. C. P. an extent on the surface of the water as to make greatphosphorescent areas. Barnacles are the only attached non-parasitic Crustacea.Certain species of them are found fastened to rocks on theseashore at low-tide mark. If you watch barnacles in rockpools, you can see them open the valves of their shells,protrude their elongated appendages, which together forma sort of rake, and pull in particles which happen to be float-ing about them. Other species of barnacles attach them-selves to floating seaweed, ship bottoms, and whales ; underthese circumstances, despite their sessile habit, they enjoy aconstant change of locality. Barnacles doubtless gaingreat protection from the circumstance that they are K 130 ZOOLOGY sessile and enclosed in shells ; but their peculiar habitshave given rise to certain peculiarities in reproduction.They are hermaphroditic; i.e. both male and female germ-cells occur in the same individ


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.
Date circa  Edit this at Structured Data on Commons
Source Image from page 148 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@N07/14782646344. It was reviewed on 2015-03-26 18:05:04 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 20151,018 × 584 (131 KB)Pixeltoo (talk | contribs)Transferred from Flickr via Flickr2Commons

You cannot overwrite this file.

There are no pages that use this file.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Image_from_page_148_of_%22Introduction_to_zoology;_a_guide_to_the_study_of_animals,_for_the_use_of_secondary_schools;%22_(1900)_(14782646344).jpg&oldid=907389460"