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The Journal of Cell Biology, Vol 40, 336-342, Copyright © 1969 by Rockefeller University Press

ARTICLE

ULTRASTRUCTURAL OBSERVATIONS OF VITELLOGENESIS IN THE SPIDER CRAB, LIBINIA EMARGINATA L



Gertrude W. Hinsch 1 and M. Virginia Cone 1

1 From the Institute of Molecular Evolution, University of Miami, Coral Gables, Florida 33134.

Miss Cone's present address is the Biology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830

Ovaries from the spider crab, Libinia emarginata L. were studied to learn more of vitellogenesis in crustaceans. Oogonia and previtellogenic oocytes were found in the core of the ovaries. Vitellogenic oocytes are located more peripherally. Profiles of the endoplasmic reticulum are abundant in the vitellogenic oocytes. The granular and agranular reticulum as well as the Golgi complex are active in yolk synthesis. As vitellogenesis proceeds, yolk precursors are incorporated into the egg by micropinocytosis at the egg surface. Thus, in Libinia, yolk materials appear to be derived from both intra- and extraoocytic sources.

Submitted on July 15, 1968
Revised on October 15, 1968


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