Note:  Do not rely on this information. It is very old.


Rhabdocoelida, an order of the group of worms known as the Turbellaria (q.v.) or Planarians, and including those members of this group which are small in size with generally a straight, unbranched intestine. The sub-class was originally founded on the latter character, but it is now found necessary to include one group with a lobed intestine in this division. It is divided into three 1 sub-orders: - (1) the Accela, including some primitive marine forms without any intestine; (2) the Rhabdocoela, including the typical members with a straight intestine; and (3) Alloicoela, with a lobed intestine. The second order is that of the Dendrocoelida.