. Smithsonian miscellaneous collections . CRUSTACEAN LIMB, NEOLENUS and APUS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 4, PL. 37 ;K Hlbij^^ JSJBH - fsl. TRILOBITE TRACKS AND TRAILS NO. 4 APPENDAGES OF TRILOBITES 20O, DESCRIPTION OF PLATE 37 PAGE Trilobite tracks and trails 174 Fig. I. (Natural size.) Trail on surface of fine compact sand wherethe legs were used to push the dorsal shield along whilethe edges of it were resting on the sand, thus leaving aslight marginal groove and a central groove made prob-ably by the median projection at the end of the S. National Museum,
. Smithsonian miscellaneous collections . CRUSTACEAN LIMB, NEOLENUS and APUS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 4, PL. 37 ;K Hlbij^^ JSJBH - fsl. TRILOBITE TRACKS AND TRAILS NO. 4 APPENDAGES OF TRILOBITES 20O, DESCRIPTION OF PLATE 37 PAGE Trilobite tracks and trails 174 Fig. I. (Natural size.) Trail on surface of fine compact sand wherethe legs were used to push the dorsal shield along whilethe edges of it were resting on the sand, thus leaving aslight marginal groove and a central groove made prob-ably by the median projection at the end of the S. National Museum, Catalogue No. 66136. 2. (Natural size.) Imprint of short strong legs with an apparent bifurcation at the outer end. Some of them are tripartitewhich indicates a central claw with the two spines. U. Museum, Catalogue No. 66137. 3. (Natural size.) Trail where the legs on the left side left their imprint for nearly their entire length, and on the right sideonly the distal joint and terminal claw touched the the trilobite had made the trail a worm came upthrough the sand and followed along in the center of thetrail for some distance. U.
Size: 1253px × 1994px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
