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It has occured to me to say a few words upon the subject of author's types. It sometimes happens that a specimen is labelled “type,” which is not the true type, i. e., the one (or ones) from which the original description was drawn up and which accords with that description. This is the criterion for types, that they do not contradict the original description. The late Mr. Morrison sent me at one time a “type” of Harris's Agrotis tessellata. Upon my wonder at his having such a specimen, I found it was merely a compared example, but it shold not have been labelled “type”.
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