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MONODELPHIA (i.e. " single uterus,"—i...

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Originally appearing in Volume V18, Page 730 of the 1911 Encyclopedia Britannica.
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MONODELPHIA (i.e. " single uterus,"—in allusion to the See also:fusion of at least the basal portions of this See also:organ, and in contradistinction to their duality in the Didelphia, or See also:Marsupialia) , See also:Cuvier's name for the See also:group which includes all the orders of mammals (See MAMMA1.1A) except the Marsupialia and See also:Monotremata; other titles for this group being Placentalia and Eutheria. With the Monotremata (q.v.) this group has no near See also:affinity; and while more nearly related to the Marsupialia (q.v.), in which an imperfect allantoic See also:placenta is sometimes See also:developed, it is broadly distinguished therefrom by the invariable presence of a functional placenta by the aid of which the foetus is nourished throughout the greater portion of See also:intra-uterine See also:life. Other distinctive features by which marsupials are separated from monodelphians or placentals will be found in the See also:article last mentioned. (R.

End of Article: MONODELPHIA (i.e. " single uterus,"—in allusion to the fusion of at least the basal portions of this organ, and in contradistinction to their duality in the Didelphia, or Marsupialia)

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