File:A naturalist's rambles on the Devonshire coast (Page 139) (5980713469).jpg

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THE RADIATE CHARACTER. 139
by the means of these muscles that the extrusion of the
polype takes place : these muscle-bands, drawing in
the membrane to a concave form, diminish the con-
tained space, which is already full, either with water,
or as I rather suppose with the vital juices ; the only
yielding part is the long body of the polype,
which accordingly is forced out through the proper
aperture.
It is manifest that the radiate structure is becoming
a subordinate character in these zoophytes ; at least
so far as that character implies a perfect circular
symmetry. This Eucratea for example has certainly
a dorsal aspect and a ventral one : the direction of
the intestinal canal, and the position of the excretory
orifice making sufficiently plain which is the former.
For from this arrangement, which is almost exactly
repeated in some of the tubicolous Rotifera, as
CEcistes for example, the oval orifice is gradually
brought lower down the back by successive stages in
Melicerta, Limnias, and Stej)ha7ioceros ; until in Mo-
nocerca, Farcularia, and Notommata among the
illoricate Rotifera, it attains the normal situation
which it holds in the higher animals. Hence I have
not scrupled to c^ll this the dorsal side of the zoo-
phyte, in the preceding description. While on thfe
subject I may mention that Eucratea frequently
inflates the membranous integument just below
the anus, in a manner common to many of the
Rotifera.
The ciliary action is doubtless in some measure
involuntary ; but the tentacles have the power of

separate and voluntary movement. I observed an
Date
Source https://www.flickr.com/photos/biodivlibrary/5980713469
Author Gosse, Philip Henry; Hullmandel & Walton
Full title
InfoField
A naturalist's rambles on the Devonshire coast / by Philip Henry Gosse.
Page ID
InfoField
29378681
Item ID
InfoField
93094 (Find related Wikimedia Commons images)
Title ID
InfoField
42528 (Find related Wikimedia Commons images)
Page numbers
InfoField
Page 139
Names
InfoField
NameFound:Eucratea NameConfirmed:Eucratea EOLID:13166264 NameBankID:2576093 NameFound:Limnias NameConfirmed:Limnias EOLID:105675 NameBankID:423980 NameFound:Melicerta NameConfirmed:Melicerta NameBankID:255482 NameFound:Notommata NameConfirmed:Notommata EOLID:43224 NameBankID:2634985 NameFound:Radiate NameConfirmed:Radiate NameBankID:5047128 NameFound:Rotifera NameConfirmed:Rotifera EOLID:6851 NameBankID:230479
BHL Page URL
InfoField
https://www.biodiversitylibrary.org/page/29378681
DOI
InfoField
10.5962/bhl.title.42528
Page type
InfoField
Text
Flickr sets
InfoField
  • A naturalist's rambles on the Devonshire coast
Flickr tags
InfoField
  • Cnidaria
  • Ctenophora
  • Description and travel
  • Devon (England)
  • Great Britain
  • Marine animals
  • Smithsonian
  • Institution
  • Libraries
  • SIL
  • bhl:page 29378681
  • dc:identifier https://www.biodiversitylibrary.org/page/29378681
  • taxonomy:binomial Eucratea chelata
  • devon (england)
  • great britain
  • sil
  • taxonomy:binomial eucratea chelata
Flickr posted date
InfoField
27 July 2011
Credit
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This file comes from the Biodiversity Heritage Library.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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This image was originally posted to Flickr by BioDivLibrary at https://flickr.com/photos/61021753@N02/5980713469. It was reviewed on 11 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

11 September 2015

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current04:56, 11 September 2015Thumbnail for version as of 04:56, 11 September 20152,051 × 3,436 (549 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = A naturalist's rambles on the Devonshire coast / by Philip Henry Gosse. | source = http://www.flickr.com/photos/biodivlibrary/5980713469 | description = THE RADIATE CHARACTER. 139 <br> by the means of these muscl...

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