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-  Eight external rows of Comb Plates.
                   -  Bioluminescence.

                   -  eg. Ctenoplana, Pleurobrachia etc.

                   -  Reproduction sexual.

































               Phylum Platehelminthes (Flat worms) –



                   -  Body dorsiventrally flattened.

                   -  Endoparasite.
                   -  Triploblastic, bilateral symmetry.

                   -  Acoelomate


                   -
                     -Flame cells- for excretion & osmoregulation.


                   -
                     -Flame cells- for excretion & osmoregulation.

                   -  Hermaphrodite
                   -  Reproduction – Sexual - Fertilisation internal.

                   -  Organ level organisation.

                     eg. Taeniasolium(Tape worm), Fasciola hepatica (liver
                   -
                     fluke).
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