With this edition, access to the texts of the famous Trait de Zoologie is now available to a worldwide readership. Parts 1, 2, and 3A of volume VII, i.e., the Crustacea, were published in French in, respectively, 1994, 1996, and 1999. Brill recognized the importance of these books and arranged for a translation to be made. However, some of the manuscripts dated from the early 1980s and it was clear from the beginning that in many fields of biology a mere translation of the existing text would not suffice. Thus, all chapters have been carefully reviewed, either by the original authors or by newly attracted specialists, and adequate updates have been prepared accordingly. This third volume of The Crustacea, revised and updated from the Trait de Zoologie contains chapters on: - Neuroanatomy - Neurohormones - Embryology - Relative Growth and Allometry The volume concludes with a list of contributors, as well as with both taxonomic and subject indices.

This volume, 9B, covers the infraorders of the Astacidea that were not covered in volume 9A (Enoplometopoidea, Nephropoidea and Glypheidea) as well as the Axiidea, Gebiidea and Anomura. With the publication of this ninth volume in the "Treatise on Zoology: The Crustacea," we depart from the sequence one would normally expect. Some crustacean groups never had a French version produced, namely, the orders Stomatopoda, Euphausiacea, Amphionidacea, and Decapoda; the largest contingent of these involved Decapoda a group of tremendous diversity and for which we have great depth of knowledge. The organization and production of these new chapters began independently from the other chapters and volumes. Originally envisioned by the editorial team to encompass volume 9 of the series, it quickly became evident that the depth of material for such a volume must involve the printing of separate fascicles. These new chapters are now nearing completion, and the decision was made to begin publication of volume 9 immediately rather than wait until after volumes 3 through 8 would appear.

This volume, 9A, contains the material on the euphausiaceans, amphionidaceans, and many of the decapods (dendrobranchiates, carideans, stenopodideans, astacidans, and palinurans). With the publication of this ninth volume in the "Treatise on Zoology: The Crustacea," we depart from the sequence one would normally expect. Some crustacean groups never had a French version produced, namely, the orders Stomatopoda, Euphausiacea, Amphionidacea, and Decapoda; the largest contingent of these involved Decapoda a group of tremendous diversity and for which we have great depth of knowledge. The organization and production of these new chapters began independently from the other chapters and volumes. Originally envisioned by the editorial team to encompass volume 9 of the series, it quickly became evident that the depth of material for such a volume must involve the printing of separate fascicles. These new chapters are now nearing completion, and the decision was made to begin publication of volume 9 immediately rather than wait until after volumes 3 through 8 would appear.