Book digitized by Google from the library of University of California and uploaded to the Internet Archive by user tpb. Paged continuously Each plate preceded by leaf with descriptive letterpress included in pagination Bibliography: pt. 1, p. 19; pt. 2, p. 57-58 pt. 1. With especial reference to the "accessory chromosome".--pt. 2. A comparative study of the heterochromosomes in certain species of Coleoptera, Hemiptera and Lepidoptera, with especial reference to sex determination
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