2002 2 volumes (complete). xlviii, xlviii, 1708 p., ca. 1200 figs, 4to, hardbound. Library stamps (Universiteit van Amsterdam), else good set.Research whilst compiling this book has uncovered a fauna about twice the size as that previously published in the literature and consequently Systema Porifera revises and stabilizes the systematics of the phylum to accommodate this new knowledge in a contemporary framework. Practical tools (key illustrations, descriptions of character) are provided to facilitate the assignment of approximately 680 extant and 100 fossil genera. These are illustrated and placed in a unified higher systematics scheme, including over forty new higher taxa. New copies from the publisher are 1200 euro!