title: Studies on a new strain of Tetrahymena pyriformis, a hymenostome ciliate, parasitic in the gut of a snail, Viviparus bengalensis.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D002923:Cilia; D004463:Ecology; D002479:Inclusion Bodies; D008566:Membranes; D012908:Snails; D013769:Tetrahymena pyriformis / Q000033:anatomy & histology / Q000145:classification*