CONTENTS 



All Bights reserved 



PAOX 



Frances Pitt. Notes on the Genetic Behaviour of certain characters 

 in the Polecat, Ferret, and in Polecat-Ferret Hybrids. (Wjth one 

 Text-figure and Plates XV and XVI) 99, 



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

 in the genus Hieramim 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 



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