• Some incorrect star ratings were awarded to The Colours of Lifeby Lionel R. Milgrom in the review in Nature 389, 687; 1997. They should have been “excellent” for range and style, “good” for depth, accuracy and accessibility, and “fair” for up-to-dateness. Our apologies for falsely raising expectations.

• In his review of Molecular Systematics of Fishesedited by T. D. Kocher and C. A. Stepien (Nature 389, 30; 1997), John Long says that the book “only covers the largest living group of fishes, the teleostean fishes”. The editors have asked us to point out that the book in fact contains a chapter on “Interrelationships of Lamniform sharks” — which are not, of course, teleosts.

• Tropical Medicine and International Health, reviewed in this year's New Journals supplement (Nature 389, 145; 1997), resulted from the pooling of four previously existing journals, not three. The title not mentioned is the German Tropical Medicine and International Health, whose independent history extends back to 1897. Antiviral Therapy, reviewed on page 144in the same supplement, has since its third issue been published by International Medical Press, not MediTech Media.