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590. . On two new Free Sponges from Singapore {Psetalia, Labaria). 



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591. . Notes on the Siliceous Spicules of Sponges, and on their Division 



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593. . On the Genus Oceanapia, Norman [Bhizockalina of Oscar Schmidt). 



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596. . Note on A. B. Meyer's paper on : Note on the Habitat of Psetalia 



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598. Gray, S. T. Natural Arrangement of British Plants. (1821.) 



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602. Grote, Eemarks on the Spongiada of Cuba, and descriptions of new 



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603. Gru.be, A. B. Ausflug nach Triest und dem Quarnero. Berhn (1861). 

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608. . Ueber Spongien. JB. schles. Ges. Bd. xlvii. p. 45. 



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