1971. xviii, 152 p., 166 text figures. paperbound. Deals with terrestrial, freshwater and marine species. Two tiny stamps in title page top margin, otherwise as new.
1976 510 p., 47 (16 col.) pls, paperbound.
1976 82, xviii p., 47 plates (16 full colour), a few text figs. Half cloth with gilt title on spine, in full colour dust jacket. This is the scarce hard cover edition. Includes descriptions and illustrations of the smaller and rarer species. Dust jacket with a few tears, inscriptions and stamp on front pastedown, otherwise clean. A good copy.
1961 xviii, 142 p., num. figs, cloth. Ex library Dr. A.C. van Bruggen (with his signature).