. Smithsonian miscellaneous collections . TRILOBITE TRACKS AND TRAILS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL 67, NO. 4, PL. 39 ■*■ IX. iwm$B& TRILOBITE TRACKS AND TRAILS NO. 4 APPENDAGES OF TRILOBITES 213 DESCRIPTION OF PLATE 39 PAGE Trilobite tracks and trails 174 Fig. 1. (Natural size.) Natural cast of a trail in which at the rightof the figure the trilobite evidently burrowed deeper intothe sandy mud. It then moved a short distance and againwent deeper into the mud. This is better shown by thefig. 2, which is of a cast made of the specimen representedby fig. 1, and which represents the a
. Smithsonian miscellaneous collections . TRILOBITE TRACKS AND TRAILS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL 67, NO. 4, PL. 39 ■*■ IX. iwm$B& TRILOBITE TRACKS AND TRAILS NO. 4 APPENDAGES OF TRILOBITES 213 DESCRIPTION OF PLATE 39 PAGE Trilobite tracks and trails 174 Fig. 1. (Natural size.) Natural cast of a trail in which at the rightof the figure the trilobite evidently burrowed deeper intothe sandy mud. It then moved a short distance and againwent deeper into the mud. This is better shown by thefig. 2, which is of a cast made of the specimen representedby fig. 1, and which represents the actual trail made bythe animal. U. S. National Museum, Catalogue No. 66148. 2. (Natural size.) Plaster cast made of the natural cast illustratedby fig. 1. This shows the original trail of the animal madeon the surface of the muddy sand. The specimen represented by figs. 1 and 2 is from locality73a, Middle Cambrian: Tapeats sandstone; in ChuarValley, Grand Canyon of the Colorado River, Arizona. 3 and 4. (Natural size.) Trail made on the surface of the sandand natural cast of it represented by fig. 4, which shows theform of the en
Size: 1230px × 2033px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
