CONTENTS 



No. 1 (July, 1920) 



PAGE 



H. Martin Leake and B. Ram Pershad. A preliminary note on the 

 Flower-Colour and Associated Characters of the Opium Poppy. 

 (With Plate I) 1 



R. N. Salaman and J. W. Lesley. Genetic Studies in Potatoes. The 



Inheritance of an Abnormal Haulm Type. (With Plates II — V) 21 



C. W. Richardson. Some Notes on Fragaria. (With two Text- 

 figures) ........... 39 



J. B. S. Haldane. Note on a Case of Linkage in Paratettix . . 47 



A. Meunissier. Observations faites k Verrieres par Philippe de Vil- 



morin, sur le Caractere " Hile noir " chez le Pois ... 53 



J. W. Heslop Harrison. The Inheritance of Melanism in the Genus 

 Tephrosia {Ectropis) with some consideration of the Inconstancy 

 of Unit Characters under Crossing. (With three Text-figures) . 61 



C. J. Bond. On the Left-sided Incidence of the Supernumerary Digit 



in Heterodactylous Fowls . . ...... 87 



No. 2 (August, 1920) 



F. L. Engledow. Inheritance in Barley. I. The Lateral Florets and 



the Rachilla. (With three Text-figures) 93 



F. L. Engledow. The Inheritance of Glume-Length and Grain-Length 



in a Wheat Cross. (With one Text-figure) ..... 109 



H. Onslow. Inheritance of Wing Colour in Lepidoptera. IV. Melan- 

 ism in Boarmia abietaria. (With Plate VI) . . . .135 



J. R. Learmouth. The Inheritance of Specific Iso-agglutinins in 



Human Blood . . , . . . . . . .141 



Edith R. Saunders. Multiple Allelomorphs and Limiting Factors in 

 Inheritance in the Stock {Matthiola incana). (With Plates VII 

 and VIII and three Text-figures) 149 



