. Smithsonian miscellaneous collections . 1. Tuponla llneata Walcott 2 and 4. Hazelia delicatula Walcott 3. Hazelia mammillata Walcott SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 67, NUMBER 7 CAMBRIANGEOLOGY AND PALEONTOLOGY IV No. ON STRUCTURE OF NEOLENUS (With Plates 91 to 105) BYCHARLES D. WALGOTT. (Publication 2584) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION DECEMBER 20, 1921 £#e £or& Q0aftttnore (prees BALTIMORE, MD., D. S. A. CAMBRIAN GEOLOGY AND PALEONTOLOGY IV No. 7.—NOTES ON STRUCTURE OF NEOLENUS By CHARLES D. WALCOTT (With Plates 92, 94) CONTENTS PAGE Intro
. Smithsonian miscellaneous collections . 1. Tuponla llneata Walcott 2 and 4. Hazelia delicatula Walcott 3. Hazelia mammillata Walcott SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 67, NUMBER 7 CAMBRIANGEOLOGY AND PALEONTOLOGY IV No. ON STRUCTURE OF NEOLENUS (With Plates 91 to 105) BYCHARLES D. WALGOTT. (Publication 2584) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION DECEMBER 20, 1921 £#e £or& Q0aftttnore (prees BALTIMORE, MD., D. S. A. CAMBRIAN GEOLOGY AND PALEONTOLOGY IV No. 7.—NOTES ON STRUCTURE OF NEOLENUS By CHARLES D. WALCOTT (With Plates 92, 94) CONTENTS PAGE Introduction 365 Notes on ventral appendages of Neolenus serratus by Messrs. E. O. Ulrich, Rudolph Ruedemann, and R. S. Bassler 366 Regarding distinctness of epipodites from the exopodites 366 Comments on preceding notes 368 Correction 369 Structure of the Exopodite and Epipodite 369 Exopodite 370 Epipodite 371 Comparison of exopodite and epipodite 372 Transverse section of the thorax of Neolenus 374 Diagram of thoracic limb 374 Diagrammatic ventral view of the appendages of Neolenus 374 Exopodites of Marrella 375 Affinities of the Trilobites 376 Supplementary Notes 377 ILLUSTRATIONS PAGE Plates 92, 94. Neolenus serratus (Rominger) 435, 437 Text figures 11, 12,13, 14. Diagrammatic views of structure
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