File:A naturalist's rambles on the Devonshire coast (Page 147) (5980716571).jpg

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THEIR PROBABLE USE. 147
which move the lower mandible are distinctly seen,
occupying the position of the palate, and extending
back to the inner surface of the skull, if we may use
such terms for an organization so remote. These
motions are highly singular to witness, and one can
scarcely look upon them without ascribing them to
an active volition in the animal.
But curious questions arise in connection with
these birds' heads. Are they a part of the organiza-
tion of the polype ? If so, why are they found
attached to some cells, and not to others? why to
some specimens and not to others ? and why are some
species of a genus furnished with them, while others,
essentially the same in every other respect, are desti-
tute of any such appendage ?
Anatomical examination does not throw any light
on these questions. The animal within the cell appears
to be organically independent of the bird's head, for
as Dr. Reid affirms, and as I have myself witnessed
in another species, the latter continues its movements
for a considerable time after the polype has been dead.
Dr. Johnston suggests that the use of the organ is to
grasp and kill passing animalcules, which then may
be drawn into the cell by means of the ciliary currents
of the tentacles ; and this seems to me not improba-
ble, and receives confirmation from the toothed
structure of the beak, which, though strongly marked,
I have not seen noticed. Plate YII. Fig. 1. Cella-
laria ciliata, nat. size. 2. a portion of a branch,
(magnified 200 diameters.) 3. a cell containing the
contracted polype. 4. the bird's head appended to

it. 5. an immature cell. G. the bird's head more
Date
Source https://www.flickr.com/photos/biodivlibrary/5980716571
Author Gosse, Philip Henry; Hullmandel & Walton
Full title
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A naturalist's rambles on the Devonshire coast / by Philip Henry Gosse.
Page ID
InfoField
29378691
Item ID
InfoField
93094 (Find related Wikimedia Commons images)
Title ID
InfoField
42528 (Find related Wikimedia Commons images)
Page numbers
InfoField
Page 147
BHL Page URL
InfoField
https://www.biodiversitylibrary.org/page/29378691
DOI
InfoField
10.5962/bhl.title.42528
Page type
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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 29378691
  • dc:identifier https://www.biodiversitylibrary.org/page/29378691
  • taxonomy:binomial Cellularia ciliata
  • taxonomy:binomial Anguinaria spatulata
  • devon (england)
  • great britain
  • sil
  • taxonomy:binomial cellularia ciliata
  • taxonomy:binomial anguinaria spatulata
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@N02/5980716571. 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 (629 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/5980716571 | description = THEIR PROBABLE USE. 147 <br> which move the lower mandible...

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