iv Contents. 



PAGE 



Notes on Semicirculants. By Thomas Muir, LL.D. . 153 



Further Observations on Mimicry among Plants. By E. 



Marloth, Ph.D., M.A. .... . 165 



On the Variation of the Hourly Meteorological Normals 

 at klmberley during the passage of a barometric de- 

 PRESSION. By J. B. Sutton, M.A., F.R.Met.S. . 169 



The Volcanic Fissure under Zuurberg. By A. W. Rogers, 



M.A., F.G.S. . . . . . .189 



On the South African Dinosaur (Hortalotarsns). By R. 



Broom, D.Sc, M.D. . . . .201 



Notes on Some Recently Re-discovered Inscribed Stones 



BEARING ON THE HlSTORY OF THE CaPE COLONY. By W. L. 



Sclater M.A. . . . . . .207 



Notes on Aloe succotrina, Lam. By R. Marloth, Ph.D. . 213 



The Climate of East London, Cape Colony. By J. R. Sutton, 



M.A., F.R.Met.S. . . . . . .217 



The Cycle Year 1905, and the Coming Season. By D. E. 



Hutchins, F.R.Met.S. . . . .237 



Underground Water in South-Eastern Bechuanaland. By 



Alex, du Toit, B.A. F.G.S. . . . .251 



Recent Information concerning South African Ferns and 



their Distribution. By T. R. Sims, F.L.S. . . 267 



On the Nature of the Effect of the Sun-spot Frequency 

 on the Variation of the Magnetic Elements at the 

 Cape of Good Hope. By G. H. H. Fincham, M.A. . 301 



The Expression of certain Symmetric Functions as an 



Aggregate of Fractions. By Thomas Muir, LL.D. . 313 



Observations on the Function of the Ethereal Oils of 



Xerophytic Plants. By R. Marloth, Ph.D., M.A . 317 



Descriptions of some New Species of Hymenoptera from 



Pearston, Cape Colony. By P. Cameron. . . 323 



On the Hymenopterous Parasites of the Mealie Stalk Borer 



(Sesamia fusca, Hampson). By P. Cameron. , . 334 



