List of scientific publications by Professor Dr. H. Engel

From the following bibliography, most of the publications directed to the general public, such as articles in newspapers, etc., as well as part of the book-reviews, have been omitted. The topics are divided over six headings: Hirudinea, Echinodermata, Opisthobranchia, History of Biology, Museology, and Miscellaneous. The author is indebted to Dr. J. H. Stock, of the Zoölogisch Museum, Amsterdam, for several additions and remarks.