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Priest, B. W. 1. On tlie Statoblasts of the Fresli- 

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— 2. Statoblasts of the Fresh-water Sponges. Amer. 

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Rathbun, R. 1. Liste of Marine Invertebrates, 

 mainly from the New England Coast, distributed by the 

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 Proc. Unit. St. Nat. Museum. IV. 1881, p. 298—303, 304 

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— 2. Sponge-Culture in Florida. — Science IL 1883. 

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Retzer, W. Die deutschen Süsswasserschwämme. — 

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Ridley, S. 0. 1. Notes on Zoophytes and Sponges 

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— 2. Notes on Sponges, with Description of a new 

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— 3. Spongiida. Report on the Zoological Collections 

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Schulze, E. F. 1. lieber den Badeschwamm. — 

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 1882, p. 199. 



