- GES251 Allium, root tips, l.s. showing all stages of mitosis
- GES252 Ascaris, fertilisation of eggs, sec.
- GES253 Ascaris, male and female pronuclei, sec.
- GES254 Ascaris, meiosis and early cleavage, sec.
- GES255 Chromosomes, human, female, of culture of peripheral blood
- GES256 Chromosomes, human, male, of culture of peripheral blood
- GES257 Drosophila genetics, „barr eye“ mutant, w.m.
- GES258 Drosophila genetics, „brown eye“ mutant, w.m.
- GES259 Drosophila genetics, „vestigial wing“ mutant, w.m.
- GES2510 Drosophila genetics, „white eye“ mutant, w.m.
- GES2511 Drosophila genetics, adult wild type, w.m.
- GES2512 Embryology of fish, l.s. of embryo showing animal mitosis
- GES2513 Eschscholtzia, stigma, w.m. showing penetrating pollen
- GES2514 Giant chromosomes from salivary gland of Chironomus, section
- GES2515 Giant chromosomes from salivary gland of Chironomus, squash preparation special stained for chromomeres
- GES2516 Lilium, microspore mother cells, first division, diakinesis – telophase
- GES2517 Lilium, microspore mother cells, first division, leptotene – zygotene stage
- GES2518 Lilium, microspore mother cells, second division, interkinesis – four cells stage
- GES2519 Ovary of rabbit, l.s. showing follicles in various stages of development
- GES2520 Polytrichum, moss, archegonium, l.s.
- GES2521 Polytrichum, moss, archegonium, w.m.
- GES2522 Sea urchin, developing of eggs, w.m. of most stages up to pluteus in the same slide
- GES2523 Spirogyra scalariform conjugation showing zygotes following conjugation
- GES2524 Testis of crayfish, sec. showing meiosis and spermatogenesis
- GES2525 Testis of mouse, t.s. showing spermatogenesis