CONTENTS 



No. 1 (December, 1919) 



PAGE 



J. W. Heslop Harrison. Studies in the Hybrid Bistoninae. IV, Con- 

 cerning the Sex and Related Problems. (With Plate I and ten 

 text-figures) .......... 1 



J. W. Heslop Harrison. A Preliminary Study of the EflFects of 

 Administering Ethyl Alcohol to the Lepidopterous Insect Selenia 

 hilunaria, with Particular Reference to the Offspring . . 39 



H. Onslow. Inheritance of Wing Colour in Lepidoptera. II. Melanism 



in Tephrosia consonaria (var. nigra Bankes). (With Plate II) . .53 



JoHS. Schmidt. Racial Studies in Fishes. III. Diallel Crossings 



with Trout (Salmo trutta L.) . . . . . . . 61 



C J. Bond. On Certain Factors concerned in the producticwi of Eye 



Colour in Birds .......... 69 



Chr. Wriedt. The Brindle Colour in Cattle in Relation to Red . 83 



No. 2 (January, 1920) 



A. B. Stout. Further experimental studies on Self-incompatibility 



in Hermaphrodite Plants. (With Plates III, IV) . . . 8.5 



J. E. Duerden. Methods of Degeneration in the Ostrich. (With 



Plates V, VI and eight text-figures) 131 



No. 3 (February, 1920) 



J. W. Heslop Harrison. Genetical Studies in the Moths of the 

 Geometrid Genus Oporahia (Oporinia) with a special considera- 

 tion of Melanism in the Lepidoptera. (With thirteen text-figures) 195 



Frances Pitt. Notes on the Inheritance of Colour and Markings in 



Pedigree Hereford Cattle. (With Plates VII— X) . . .281 



