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File:EB1911 Foraminifera - Operculina laid open.jpg

EB1911_Foraminifera_-_Operculina_laid_open.jpg ‎(744 × 436 pixels, file size: 145 KB, MIME type: image/jpeg)

Summary

Description
English: Operculina laid open, to show its internal structure. Legend: a, Marginal cord seen in cross section at a’. b, b, External walls of the chambers. c, c, Cavities of the chambers. c′, c′, Their alar prolongations. d, d, Septa divided at d’, d’, and at d”, so as to lay open the interseptal canals, the general distribution of which is seen in the septa e, e; the lines radiating from e, e point to the secondary pores. g, g, Non-tubular columns.
Date published 1911
Source “Foraminifera,” Encyclopædia Britannica (11th ed.), v. 10, 1911, p. 631, fig. 9.
Author Marcus Manuel Hartog
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

File history

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Date/TimeThumbnailDimensionsUserComment
current17:09, 19 July 2018Thumbnail for version as of 17:09, 19 July 2018744 × 436 (145 KB)Bob Burkhardt{{Information |description ={{en|1=''Operculina'' laid open, to show its internal structure. Legend: ''a'', Marginal cord seen in cross section at ''a''’. ''b'', ''b'', External walls of the chambers. ''c'', ''c'', Cavities of the chambers. ''c''′, ''c''′, Their alar prolongations. ''d'', ''d'', Septa divided at ''d''’, ''d''’, and at ''d''”, so as to lay open the interseptal canals, the general distribution of which is seen in the septa ''e'', ''e''; the lines radiating from ''e'', ''e''...
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