Extra large size, approx. 1600 times, showing cell inventory of a protozoa : macro and micronucles, controactile vacuoles, cytostome with membranellae, myonemes and food vacuoles and the formation of the endo and ectoplasm and the network of neuronemes. The detailed block shows the structure of pellicle of the ectoplasm, and the position and order of trichocysts and a range of cilia in typical order. Dissected in to two parts, on stand with key-card.