TRANSACTIONS 
OF THE 
ROYAL SOCIETY OF ED 
VOLUME LII, PART IV.— SESSION 
CONTENTS. 
XXV [I. Scottish National Antarctic Expedition, 1902-1904: Gambrian 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 
{Issued June 9, 1920.) 
XXVIII. New Stelar Facts, and their Bearing on Stelar Theories for the Ferns. By John M ‘Lean 
Thompson, M.A., D.Sc., F.L.S., Lecturer on Plant Morphology, Glasgow University. 
(With Four Plates and Nine Figures in the Text), . . . . .715 
{Issued July 9, 1920.) 
XXIX. Isle of Wight Disease in Hive Bees . 
(1) The Etiology of the Disease. By John Bennie, D.Sc. ; Philip Bruce White, 
B.Sc. ; and Elsie J. Harvey. (With One Plate),. .... 737 
(2) The Pathology of Isle of Wight Disease in Hive Bees. By Philip Bruce White, 
B.Sc., Bacteriologist to the Bee Disease Investigation, University of Aberdeen 
and N. of Scotland College of Agriculture. Communicated by Dr John Rennie. 
(With One Plate), . . . . . . . .755 
(3) Isle of Wight Disease in Hive Bees — Experiments on Infection ivith Tarsonemus 
woodi, n. sp. By Elsie J. Harvey. Communicated by Dr John Rennie, . 765 
(4) Isle of Wight Disease in Hive Bees — Acarine Disease : The Organism associated with 
the Disease — Tarsonemus woodi, n. sp. By John Rennie, D.Sc. (With One 
Plate and Two Figures in the Text), . . . . .768 
{Issued March 25, 1921.) 
XXX. Shackleton Antarctic Expedition, 1914-1917 : Depths and Deposits of the Weddell Sea. 
By J. M. Wordie, M.A., F.G.S. Communicated by Professor J. W. Gregory, F.R.S., . 781 
{Issued May 27, 1921.) 
XXXI. Shacldeton Antarctic Expedition, 1914-1917 : The Natural History of Pack-Ice as observed 
in the Weddell Sea. By J. M. Wordie, M.A., F.G.S. Communicated by Professor 
J. W. Gregory, F.R.S. (With Nine Text-Figures and Four Plates), . . . 795 
{Issued June 21, 1921.) 
XXXII. On Old Red Sandstone Plants shoiving Structure, from the Rliynie. Chert Bed, Aberdeenshire. 
Part IV. Restorations of the Vascular Cryptogams, and Discussion of their Bearing on 
the General Morphology of the Pteridophyta and the Origin of the Organisation of Land 
Plants. By R. Kidston, LL.D., D.Sc., F.R.S., and W. H. Lang, D.Sc., F.R.S., Barker 
Professor of Cryptogamic Botany in the University of Manchester. (With Five Plates), 831 
{Issued August 26, 1921.) 
XXXIII. On Old Red Sandstone Plants showing Structure, from the Rhynie Chert Bed, Aberdeenshire. 
Part V. The Thallophyta occurring in the Peat-Bed ; the Succession of the Plants through- 
out a Vertical Section of the Bed, and the Conditions of Accumulation and Preservation 
of the Deposit. By R. Kidston, LL.D., D.Sc., F.R.S. , and W. H. Lang, D.Sc., F.R.S., 
Barker Professor of Cryptogamic Botany in the University of Manchester. (With Ten 
Plates and One Figure in the Text), . . . . . . 855 
{Issued November 30, 1921.) 
Index, ............ 903 
N BU 
920-1 
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