Page:Proceedings of the Royal Society of London Vol 69.djvu/346

330 January 23, 1902. Sir WILLIAM HUGGINS, K.C.B., D.C.L., President, in the Chair.

Mr. Arthur John Evans, Captain Henry B. Jackson, and Professor Charles J. Martin were admitted into the Society.

A List of the Presents received was laid on the table, and thanks ordered for them.

The following Papers were read :

I. " Mathematical Contributions to the Theory of Evolution. XI. On the Influence of Natural Selection on the Variability and Correlation of Organs." By Professor KARL PEARSON, F.R.S.

II. "On the Correlation of Intellectual Ability with the Size and Shape of the Head. (Preliminary Notice.)" By Professor KARL PEARSON, F.R.S.

III. " On the Mechanism of the so-called ' Peripheral Reflex Secretion '

of the Pancreas. (Preliminary Communication.)" By Dr. W. M. BAYLISS and Dr. E. H. STARLING, F.R.S.

IV. " A Short Description of the Culicidse of India, with Descriptions

of New Species of Anopheles." By F. V. THEOBALD. Com- municated by Professor E. RAY LANKESTER, F.R.S.

V. " The Affinity of Tmesipteris with the Sphenophyllales." By Professor A. P. W. THOMAS. Communicated by Professor HOWES, F.R.S.

VI. " On the Excretory Organs of Amphioxus." By E. S. GOODRICH. Communicated by Professor E. RAY LANKESTER, F.R.S.

The influence of directed natural or artificial selection on the characters of a race is one which it is fundamental for the purposes of evolution to appreciate quantitatively. I have already shown in an