- 1. Ova from Psammechinus (sea urchin). Unfertilized ova, fertilized ova, early cleavage stages Lieder_5012e
- 2. Sea urchin, unfertilized eggs Lieder_5201d
- 3. Sea urchin, fertilized eggs Lieder_5202d
- 4. Sea urchin, two cells Lieder_5203d
- 5. Sea urchin, four cells Lieder_5204d
- 6. Sea urchin, eight cells Lieder_5205d
- 7. Sea urchin, sixteen cells Lieder_5206d
- 8. Sea urchin, thirty-two cells Lieder_5207d
- 9. Sea urchin, morula Lieder_5208d
- 10. Sea urchin, blastula Lieder_5209d
- 11. Sea urchin, blastula, beginning gastrulation Lieder_5210d
- 12. Sea urchin, blastula, progressive gastrulation Lieder_5211d
- 13. Sea urchin, pluteus larva Lieder_5212d
- 14. Young sea urchin, radial section Lieder_73609d
- 15. Development of sea urchin, eggs in different stages Lieder_73607e
- 16. Sea urchin, pluteus larva Lieder_73608d
- 17. Pluteus larvae of sea urchin Lieder_75808d
- 18. Eggs of sea urchin, different phases of development Lieder_75809e
- 19. Sea urchin, developing of eggs, w.m. of most stages up to pluteus in the same slide Lieder_76009f
- 20. Echinus, sea urchin, sagittal l.s. of entire young specimen Lieder_Ec118d
- 21. Sea urchin embryology (Psammechinus miliaris), unfertilized ova w.m. Lieder_Ec201d
- 22. Sea urchin embryology, fertilized ova w.m. Lieder_Ec202d
- 23. Sea urchin embryology, two cell stage w.m. Lieder_Ec203d
- 24. Sea urchin embryology, four cell stage w.m. Lieder_Ec204d
- 25. Sea urchin embryology, eight cell stage w.m. Lieder_Ec205d
- 26. Sea urchin embryology, sixteen cell stage w.m. Lieder_Ec206d
- 27. Sea urchin embryology, thirty two cell stage w.m. Lieder_Ec207d
- 28. Sea urchin embryology, morula w.m. Lieder_Ec208d
- 29. Sea urchin embryology, blastula w.m. Lieder_Ec209d
- 30. Sea urchin embryology, beginning gastrulation w.m. Lieder_Ec210d
- 31. Sea urchin embryology, progressive gastrulation w.m. Lieder_Ec211d
- 32. Sea urchin embryology, pluteus larva w.m. Lieder_Ec212d
- 33. Sea urchin embryology, strewn slide of various stages w.m. Lieder_Ec213e
- 34. The Sea Urchin Embryology (Psammechinus miliaris), 25 projection slides Lieder_3310
- 35. Sea Urchin Embryology, 12 microscope slides Lieder_GR-F1