CONTENTS. 
PAGE 
Some Statistics of Thunder and Lightning at Kimberley. By J. E. 
Sutton 
South African Perisporiaceae. VI.— The Haustoria of the Genera 
Meliola and Irene. By Ethel M. Doidge. (With seven 
Text-figures) 
Colour and Chemical Constitution. Part XI. — A Systematic Study 
of the Brominated Phenolphthaleins regarding the Eolation 
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-figure) • 1^3 
South African Alcyonacea. By J. Stuart Thomson. (With Plates 
V and VI and five Text-figures) . . . . . . .1^9 
A Possible Lunar Influence upon the Velocity of the Wind at 
Kimberley. (Third Paper.) By J. E. Sutton. (With one 
Text-figure) . . . . • . • . • .177 
South African Xylarias occurring around Durban, Natal. By 
Paul A. VAN DER BiJL. (With Plates VII and VIII) . . 181 
The Genus Tulostoma in South Africa. By Paul A. van der Bijl. 
(With Plate IX) . . . " 185 
On a Fungus — Ovulariopsis papayce, n. sp. — which causes Powdery 
Mildew on the Leaves of the Pawpaw Plant {Carica papaya, 
Linn.). By Paul A. van der Bijl. (With Plate X and one 
Text-figure) • • • 187 
Note on Lysurus Woodii (MacOwan), Lloyd. By Paul A. van der 
Bijl. (With Plate XI) 191 
A Prehistoric Eock- Sculpture from the North-Eastern Transvaal. 
By C. Pijper. (With Plate XII) 195 
The Action of Urginea Burhei (Baker). By J. W. C. Gunn. (With 
five Text-figures) ... 197 
