CONTENTS 



No. 1 (April, 1921) 



I'AOE 



B. MiYAZAWA. Studies of Inheritance in the Japanese Convolvulus 



Part II. (With Plate I (coloured)) 1 



A. F. Blakeslee. a Graft- Infectious Disease of Datura resembling 



a Vegetative Mutation. (With Plates II— VI) . . . . 17 



R. C. PuNNETT and the late Major P. G. Bailey. Genetic Studies in 



Poultry. III. Hen-feathered Cocks. (With two Text-figures and 



Plates VII— XI) 37 



J. A. S. Watson. A Mendelian Experiment with Aberdeen- Angus 



and West Highland Cattle. (With Plate XII) .... 59 

 Edith R. Saunders. Note on the Evolution of the Double Stock 



(Matthiola incana). (With three Text-figures) .... 69 



H. L. Trachtenberg. The Analysis of the Results of Professor 



Johannes Schmidt's Diallel Crossings with Trout ... 75 



Ei.iZABETH Robertson. Notes on Breeding for Increase of Milk in 



Dairy Cattle. (With Eight Pedigree Charts) .... 79 



W. Bateson. Root-Cuttings and Chimaeras. II. (With Plates XIII 



(coloured) and XIV) 91 



No. 2 (September, 1921) 



Frances Pitt. Notes on the Genetic Behaviour of certain characters 

 in the Polecat, Ferret, and in Polecat- Ferret Hybrids. (With 

 one Text-figure and Plates XV and XVI) 99 



C. H. Ostenfeld. Some Experiments on the Origin of New Forms 



in the genus Hieracium sub-genus Archieracium. (With Plates 

 XVII and XVIII) 117 



H. Onslow. The Inheritance of Wing-Colour in Lepidoptera. V. Me- 

 lanism in Abraxas grossulariata (var. varleyata, Porritt). (With 

 six Text-figures and Plate XIX) 123 



F. A. E. Crew. Sex-Reversal in Frogs and Toads. A review of the 

 recorded cases of abnormality of the reproductive system and an 

 account of a breeding experiment. (With twenty-three Text- 

 figures) . . . . . . . . . . .141 



I. Leitch. a study of the Segregation of a Quantitative Character in 

 a cross between a pure line of Beans and a Mutant from it. 

 (With four Text-figures) 183 



