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A monograph of the fresh-water polyzoa : including all the known species, both British and foreign / by George James Allman.
By: Allman, George James,
Publication info: London :Ray Society,1856.
Contributed by: Harvard University, MCZ, Ernst Mayr Library
Subjects: Bryozoa Ectoprocts ram
BHL Collections: Charles Darwin's Library | Ernst Mayr Library of the MCZ, Harvard University
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