STUDIES ON THE STOMATOGENESIS OF FRONTONIA ACUMIN AT A(CILIOPHORA, HYMENOSTOMATIDA

Stomatogenesis and development of nuclear apparatus of Frontonia acuminata Ehrenburg, 1833 were described.Its general process exhibits similar patterns to other members of the genus Frontonia,The morphogenesis begins with the appearance of arow of basal bodies(oral primordium)occurring between the vestibular kineties and paroral membrane, which seems deriving from the division of the parental paro-ral membrane. With the increase of the basal bodies in number,the oral primordium develops subsequently into the peniculi, paroral membrane and vestibular kineties of the opisthe. The old buccal organelles are finally inherited by the proter.It is thus obviously that no visible changes can be observed in somatic kineties during the morphogenesis.