XII. THE PALAEONTOLOGICAL RECORD. II. PLANTS:
D.H. SCOTT, President of the Linnean Society of London.

XIII. THE INFLUENCE OF ENVIRONMENT ON THE FORMS OF PLANTS:
GEORG KLEBS, Professor of Botany in the University of Heidelberg.

XIV. EXPERIMENTAL STUDY OF THE INFLUENCE OF ENVIRONMENT ON ANIMALS:
JACQUES LOEB, Professor of Physiology in the University of California.

XV. THE VALUE OF COLOUR IN THE STRUGGLE FOR LIFE:
E.B. POULTON, Hope Professor of Zoology in the University of Oxford.

XVI. GEOGRAPHICAL DISTRIBUTION OF PLANTS:
SIR WILLIAM THISELTON-DYER.

XVII. GEOGRAPHICAL DISTRIBUTION OF ANIMALS:
HANS GADOW, Strickland Curator and Lecturer on Zoology in the University
of Cambridge.

XVIII. DARWIN AND GEOLOGY:
J.W. JUDD.

XIX. DARWIN'S WORK ON THE MOVEMENTS OF PLANTS:
FRANCIS DARWIN.

XX. THE BIOLOGY OF FLOWERS:
K. GOEBEL, Professor of Botany in the University of Munich.

XXI. MENTAL FACTORS IN EVOLUTION: