الفهرس 
Histological investigationOnly 14 pages are availabe for public view
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Abstract
When comparing the organization and biology of cephalopods
with other invertebrates or especially developed species of other
mollusc groups, we keep arriving at the conclusion that the
representatives of this group has attained a particularly high level of
organization. Thus, it seems justified to accord them a particular status
among other molluscs and invertebrates . On the other hand, a
comparison of cephalopods with vertebrates suggests itself with respect
to their cerebralization , the efficiency of the sense organs and their high
metabolic rate lead to the fact that there are manifold parallels with and
convergences towards this group.
Cephalopods constitute a significant part of the Egyptian fauna
today. They are of major interest to man and most species are of
economic importance. Cephalopods are considered among the valuable
food items and are consumed mainly by inhibitants of cities located on
marine coasts . In spite of the.economic importarrce of this group as a
promosing non traditional protein supply as well as its greatest
importance from the evolutionary point of view, there is no detailed
information about it . In Egypt , the history of research on cephalopods is
poor and only five attempts were carried in this concern, most of them
are taxonomic; Therefore, it was necessary to carry out the present work
in attempt to invade this problem for the first time in Egypt with a hope
that such study can do justice to the complexity and advancement.