In 1971 I published a review of ichnology other concentrating only on traces made (Houston AAPG: SEPM Trace Fossil Field by a certain group of organisms, regardless Trip Guidebook) that I thought could be of their setting. Nevertheless, needless re- dundancy has hopefully been eliminated. expanded rather easily into a worthwhile Some of the chapters are more special- book on the subject. I probed that possi- ized than others (because of the nature...