Set comprises: Astacus testis v.s., Locust testis v.s., Locust testis squash, Locust embryo squash, Allium root-tip l.s., Lilium anthers t.s. early prophase, Lilium anthers t.s. late prophase, Lilium anthers t.s. metaphase, Lilium anthers t.s. late first division, Lilium anthers t.s. second division.