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Les Colonies Animales et la Formation des Organismes. 798 pp., 2 pi., 158 

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 Peters, W. 



Ueber das Geschleclit der Seeigel. Arch.f. Anat. Physiol, u. wissensch. Med., 

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(In Sea-urchins sexes are separate.) 

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Beschrcibung zweier Missgebildeter See-Igel, nebst Bemerkungen iiber die 

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 Beschreibung einiger neuen Echinodcrmen nebst kritischen Bemerkungen ueber 

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Reports on the Dredging Operations of the U. S. Coast Survey Steamer 

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English transl. by Henry Lawson. 284 pp. London, I864. 

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On Some Remarkable Forms of Animal from the Great Deeps off the Norwe- 

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