1. Department of Vertebrate Paleontology; American Museum of Natural History; Central Park West New York, New York 10024-5192
2. Department of Geosciences, Queensland Museum; Hendra Queensland 4011 Australia
3. Hollings Marine Laboratory and Department of Biology; College of Charleston South Carolina 29412
4. Steinhammer Palaeontology Laboratory; New Brunswick Museum; Saint John New Brunswick E2K 1E5 Canada