CONTENTS. 
Memoirs. 
PAGE 
I. The Probable Error of a Mean. By " Student " . . . . 1 
II. Split-Hand and Split-Foot Deformities, their Types, Origin and 
Transmission. By Thomas Lewis, M.D., D.Sc, and Dennis 
Embleton 26 
III. On the Generalised Probable Error in Multiple Normal Coirelation. 
By Karl Pearson, F.R.S., and Alice Lee, Sc.D. . . .59 
IV. On the Inheritance of the Deformity known as Split-Foot or Lobster- 
Claw. By Karl Pearson, F.R.S 69 
V. On a Determinantal Theory of Inheritance, from Notes and Suggestions 
by the late W. F. R. Weldon. By Karl Pearson, F.R.S. . . 80 
VI. Pigmentation Survey of School Children in .Scotland. 
(a) Committee and Grants . . . . . . . .129 
(6) Report. By J. F. Tocher 130 
VII. Variation, Development and Growth in Holothwia Jloridana, Pour- 
tales. By Charles Lincoln Edwards 236 
VIII. Probable Error of a Correlation Coefficient. By " Student " . 302 
IX. Zur Frage vom viergliederigen Tarsus der Blattidae und der Regene- 
ration der Fiisse derselben. Von Th. S. Schtscherbakow . 311 
X. Some Statistical Observations on Termites, mainly based on the work 
of the late Mr G. D. Havilaud. By Ernest Warren, D.Sc. . 329 
XL Note on the Skin-Colour of the Crosses between Negro and White. 
By Karl Pearson, F.R.S . . . . 348 
XII. Ueber die Langen variation der Coniferennadeln. Von A. Heyer . 354 
XIII. Statistical Study of Anti-typhoid Inoculation. By G. D. Maynard 366 
