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harvard universityernst mayr librarymuseum of comparative zoologyzoologyarachnidaarachniddie arachniden : getreu nach der natur abgebildet und beschrieben bd.1-4 (1831), plates 1-144sea urchinechinimemoirs of the museum of comparative zoölogy, at harvard college, cambridge, mass. : v.31 (1904) plates
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