CONTENTS. 
PART L (1917-18.) 
NUMBER PAGE 
I. On the Leaf-Trace in some Pinnate Leaves. By R. C. Davie, M.A., D.Sc., 
Lecturer in Botany in the University of Edinburgh. (With One Plate). 1 
II. The Insect Association of a Local Environmental Complex in the District 
of Holmes Chapel , Cheshire. By Alfred E. Cameron, M.A., D.Sc. 
(Aberd.), M.Sc. (Viet.) ; Field Officer, Entomological Branch, Depart- 
ment of Agriculture, Canada ; late Government Scholar of the Depart- 
ment of Agricultural Entomology, Manchester University. (With 
Two Plates), . . . . . . . .37 
III. The Gametophyte of Psilotum. By G. P. Darnell-Smith, B.Sc., F.I.C. 
(With Two Plates), . . . . . . .79 
IV. The Gametophyte Generation of the Psilotacew. By A. Anstruther 
Lawson, D.Sc., Professor of Botany, University of Sydney. (With 
Five Plates), . . . . . . . .93 
V. The Moulting of the King Penguin ( Aptenodytes patagonica). By Pro- 
fessor J. Cossar Ewart, F.R.S., and Dorothy Mackenzie, F.S.Z.S. 
(With Two Plates), . . . . . . .115 
VI. The Anatomy and Affinity of Stromatopteris moniliformis , Mett. By 
John M‘Lean Thompson, M.A., D.Sc., Senior Assistant to the Professor 
of Botany, and late Robert Donaldson Research Scholar, Glasgow 
University. (With Four Plates, and Figures in the Text), . . 133 
VII. A Further Contribution to the Knowledge of Platyzoma microphyllum 
P. Br. By John M‘Lean Thompson, M.A., D.Sc., Glasgow University. 
(With Seventeen Figures in the Text), . . . . 157 
VIII. Factorials and Allied Products with their Logarithms. By Frank 
Robbins, F.R.A.S., . . . . . . .167 
IX. The Highland Border Rocks of the Aberfoyle District. By Professor 
T. J. Jehu and Dr Robert Campbell. (With Six Plates and Ten 
Text-figures), . . . . . .175 
