CONTENTS. 
vn 
NUMBEB PA0E 
PART III. (1919-20.) 
XIX. Contributions towards a Knoivledge of the Anatomy of the Lower 
Dicotyledons. II. The Anatomy of the Stem of the Berberidaceae. 
By R. J. Harvey-Gibson, C.B.E., D.L., M.A., Professor of Botany, Uni- 
versity of Liverpool ; and Elsie Horsman, M. Sc. (With One Plate), . 501 
XX. Contributions towards a Knowledge of the Anatomy of the Lower 
Dictoyledons. III. The Anatomy of the Stem of the Calyeanthacese. 
By Christine E. Quinlan, M.Sc., University College, Cork. (With 
One Plate), ........ 517 
XXI. The Comparative Myology of the Shoulder Girdle and Pectoral Fin 
of Fishes. By Captain E. W. Shann, B.Sc., Onndle School. (With 
Four Plates and One Figure in the Text), . . . .531 
XXII. The Morphology of the Stele of Platyzoma microphyllum, R. Br. By 
John M‘Lean Thompson, M.A., D.Sc., F.L.S., Lecturer on Plant 
Morphology, Glasgow University. (With Three Plates and Three 
Figures in the Text), ....... 571 
XXIII Amphicheiral Knots. By Mary Gertrude Haseman, Ph.D. (With 
One Plate), ........ 597 
XXIV. On Old Red Sandstone Plants showing Structure, from the Rhynie Chert 
Bed, Aberdeenshire. Part II. Additional Notes on Rhynia Gwynne- 
Vaughani, Kidston and Lang ; with Descriptions of Rhynia major, 
n.sp., and Hornea Lignieri, n.g., n.sp. By R. Kidston, LL.D., 
F.R.S., and W. LI. Lang, D.Sc., F.R.S., Barker Professor of Crypto- 
gamic Botany in the University of Manchester. (With Ten Plates), 603 
XXV. Theoretical Determination of the Longitudinal Seiches of Lake 
Geneva. By A. T. Doodson, R. M. Carey, and R. Baldwin, Tidal 
Institute, University of Liverpool, . . ... . 629 
XXVI. On Old Red Sandstone Plants showing Structure, from the Rhynie 
Chert Bed, Aberdeenshire. Part III. Asteroxylon Mackiei, Kidston 
and Lang. By R. Kidston, LL.D., F.R.S., and W. H. Lang, D.Sc., 
F.R.S., Barker Professor of Cryptogamic Botany in the University 
of Manchester. (With Seventeen Plates), .... 643 
PART IV. (1920-21.) 
XXVII. Scottish National Antarctic Expedition, 1902-1904; Cambrian 
Organic Remains from a Dredging in the Weddell Sea. By W. T. 
Gordon, D.Sc., Reader in Geology, University of London, King’s 
College. (With Seven Plates), . . . . .681 
