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Subjects
- Leeches -- anatomy & histology3
- Leeches -- cytology2
- Reproductive Behavior -- physiology2
- Aquatic Organisms1
- Biology -- organization & administration1
- Cell Physiological Phenomena1
- Cells -- cytology1
- Cells -- metabolism1
- Cleavage Stage, Ovum -- metabolism1
- Cytoplasm -- physiology1
- Fertilization -- physiology1
- Fishes1
- Flight, Animal -- physiology1
- Germ Layers -- cytology1
- Invertebrates -- cytology1
- Japan1
- Laboratories1
- Leeches1
- Leeches -- embryology1
- Marine Biological Laboratory (Woods Hole, Mass.)1