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24. BiDDEK. — " On the Flask-shaped Ectoderm and Spongoblasts in 



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25. MiNCiiiN, — " The Oscula and Anatomy of Leucosolenia clathrus," 



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31. Dendy. — " Studies on the Comparative Anatomy of Sponges. IV". On the 



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32. MiNCHiN. — "Note on a Sieve-like Membrane across the Oscula of a 



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the Anatomy and Histology of Stelospongus flabelliformis, 

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34. PoLEJAEFF. — "Ueber das Spermaund die Spermatogenese bei Sycandra 



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