Publication
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On the „Diana” and the „Roloway” Article
Notes from the Leyden Museum, 20(4), 233-239.January 1899
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Zoological results of the Dutch Scientific Expedition to Central Borneo Article
Notes from the Leyden Museum, 21(1/3), 53-144.January 1899
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On three apparently new species of Birds from the islands Batu, Sumbawa and Alor Article
Notes from the Leyden Museum, 20(4), 224-226.January 1899
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Descriptions of Earthworms Article
Notes from the Leyden Museum, 21(1/3), 27-30.January 1899
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On a new variety of Leptopoma manadense Pfr Article
Notes from the Leyden Museum, 21(1/3), 31-32.January 1899
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Merula Javanica (Horse.) and M. fumida (S. Müll.) two distinct species Article
Notes from the Leyden Museum, 20(4), 227-230.January 1899
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Aspidosiphon Cylindricus, n. sp Article
Notes from the Leyden Museum, 20(4), 195-198.January 1899
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On the variability of characters in Perichaetidae Article
Notes from the Leyden Museum, 20(4), 201-209.January 1899