Smithsonian miscellaneous collections (1924) (14763805725)

Identifier: smithsonianmisce671924smit (find matches)
Title: Smithsonian miscellaneous collections
Year: 1862 (1860s)
Authors: Smithsonian Institution
Subjects: Science
Publisher: Washington : Smithsonian Institution
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries



Text Appearing Before Image:
individual imprints formed probably by the claw and spinesof the distal extremity of the leg. The central portion ofthe track has been cut out in order to bring the imprints ofthe two sides within the limits of the plate. U. S. NationalMuseum, Catalogue No. 58593. The specimen represented is from locality 220b, UpperCambrian: Potsdam sandstone; near Beauharnois, Prov-ince of Quebec, Canada. These tracks were illustrated on pi. 47. Vol. 57, Smith-sonian Miscellaneous Collections, 1912.3. (Natural size.) Photograph of a natural cast of annelid trails,trilobite trails, etc., which illustrate the abundance of an-nelids in and on the muddy surface of the bottom overwhich the trilobite was foraging for food. U. S. NationalMuseum, Catalogue No. 66153. From locality 8u, Middle Cambrian: Flathead sandstoneand shales; 4 miles (6.4 km.) above Walkers ranch incanyon, North Fork of Dearborn River, Lewis and ClarkNational Forest, Montana. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 4, PL. 42
Text Appearing After Image:
TRILOBITE TRACKS AND ANNELID TRAILS INDEX The references in heavy-face type refer to the pages upon which the generaand species are described and figured. PAGE Abdominal appendages, Neolenus 131 Acknowledgments 118 Agassiz, Dr. Alexander, acknowledgments 205 study of Limulns 123 Agassiz, Prof. Louis, promise made to 116 Agnostus, trails I7S Anal aperture, of Neolenus 131 Anaspidacea, compared with trilobite limbs 173 comparison with Neolenus 169 epipodites 166 relation to Neolenus 170 respiration 164 Anaspids, compared with Calymene and Ceraurus 151 Anaspides, compared with Ceraurus 207 Neolenus 130, 170, 207 Triarthrus 171 from Tasmania, New Zealand 170 tasmanice, G. M. Thomson, discussed 170 figured, pi. 35, figs. 1, 2 207 text fig. 1 171 compared with Neolenus serratus 166 Paranaspides 166 Annelids, food for trilobites 174 Antennules, of Neolenus 127 Appendages, notes on species 1 if trilobite, summarized 177 Apus, attachment of limbs 159 compared with Neolenus 129 Triarthrus 136,