v.q 
CONTENTS. 
PAGE 
Contributions to our Knowledge of the Freshwater Algae 
OF Africa: 3. Freshwater Algae (exclusive of Diatoms), 
MAINLY FROM THE TrANSKEI TERRITORIES, CaPE CoLONY. By 
F. E. Fritsch, D.Sc. (Professor of Botany, East London College, 
University of London), and Miss E. Stephens, B.A. (South 
African College, Cape Town). (With 29 figures in the text) . 1 
A Note on the Wales Frequenting South African Waters. 
By Dr. L. Peringuey. (With Plate I) 73 
Notes on Some South African Entomophthoraceae. By S. H. 
Skaife. (With Plates II— IV) 77 
Overgrowths on Diamond. By J. E. Sutton .... 87 
Some Statistics on Thunder and Lightning at Kimberley. 
By J. E. Sutton 106 
South African Perisporiaceae: YI. — The Haustoria of the 
Gtenera Meliola and Irene. By Ethel M. Doidge. (With 
seven Text-figs.) .......... 117 
Colour and Chemical Constitution: Part XL— A Systematic 
Study of the Brominated Phenolphthaleins regarding 
THE EeLATION between POSITION AND CoLOUR. By JaMES 
MoiR 129 
A Note ON the Eelationship between Cloud and Sunshine. 
By J. E. Sutton 137 
A Possible Lunar Influence upon the Velocity of the Wind 
AT Kimberley. (Second Paper.) By J. E. Sutton. (With 
one Text-fig.) 143 
South African Alcyonacea. By J. Stuart Thomson. (With 
Plates V and VI and five Text-figs.) 149 
A Possible Lunar Influence upon the Velocity of the Wind 
AT Kimberley. (Third Paper.) By J. E. Sutton. (With 
one Text-fig.) 177 
South African Xylarias occurring around Durban, Natal. 
By Paul A. van der Bijl. (With Plates VII and VIII) . 181 
The GrENUs Tulostoma in South Africa. By Paul A. van der 
Bijl. (With Plate IX) 185 
