Observations on two new species of Monocystis Stein, 1848 (Protozoa: Apicomplexa: Monocystidae) Monocystis darjeelingensis sp.n. and M. ranaghatensis sp.n. from earthworms (Annelida: Oligochaeta) of West Bengal, India. Animal Biology (Leiden), 55(2), June 2005: 123-132. 127 [Zoological Record Volume 141]