vi Contents 



PAGE 



Edith E. Hodgkinson. Some Experiments on the Rotifer Hydatina 187 



Arthur W. Hill. The History of Primula malacoides, Franchet, 

 under cultivation, (With Plates XI and XII and one text- 

 figure) , . . . . . . . .193 



Rainard B. RoBBiNS. Partial Self-Fertilization contrasted with 



Brother and Sister Mating . . . . . . .199 



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



in Poultry. I Inheritance of Leg-feathering .... 203 



Edith R. Saunders. On the Occurrence, Behaviour and Origin of 

 a Smooth-stemmed Form of the Counnon Foxglove (Digitalis 

 purpurea) .......... 215 



No. 4 (August, 1918) 



A. St Clair Caporn. The Inheritance of Tight and Loose Paleae 



in Avena nuda Crosses. (With six text-figures) . . . 229 



A. St Clair Caporn. An Account of an Experiment to Determine 

 the Heredity of Early and Ijate Ripening in an Oat Cross. (With 

 one text-tigure) . . . . . . . . . . 247 



A. St Clair Caporn. On a Case of Permanent Variation in the Glume- 

 Lengths of Extracted Parental Types and the Inheritance of 

 Purple Colour in the Cross Triticum polonicum x T. elohoni. 

 (With Plates XIII and XIV, three charts and one text-figure) . 259 



Prepared by Ida Sutton. Report on Tests of Self-Sterility in Plums, 

 Cherries, and Apples at the John Innes Horticultural Institution. 

 (With Plate XV) 281 



COEUIGENDA IN VOL. VI. 

 P. 197, line 10, /or +{\ -s) {{u + ^v + ^io] read ■\- {l - s) {lu + ^v + ^wy 



„ 12, for I\=B- I "2i^ M + 2^, ^^ + "2?+^ wj 



^ ^ , f 2'-+i - 1 1 2'-+i - 1 V* 



read F,=sr ^-^^^ " + gm ^ + "2^+2- «'} • 



P. 200, line 2, for ,/OZ,^_^!^ = J^^^ 

 ' ■> V 4 4-8 2(2-8) V 2(4-8) 



/3 T' n /3(2-s)2 



''^^ V 4 43^ «^2l2::8) = V nJ^S) ' 



" ^' •^'"'' v A "^i \/i '■^"^ s/re "^'i = vl • 



