Descendenz und Hybriden. — Morphologie und Teratologie. 1 1 



from the belief that the Operation of natural selection must be 

 slow, whereas Karl Pearson has shewn that, on bis view 

 of regression, four to five generations of selected parents will 

 produce a race whose mean approximates closely to that of the 

 selected parents, and this is in complete accordance with the 

 experimental results of de Vries. Karl Pearson. 



Weldon, W. f. R., Seasonal change in the characters 

 of Aster prenanthoides (Muhl.). Note on a paper by 

 G. H. ShuU. (Biometrika. Vol. II. Part I. 1902. p. 113 



— 115.) 



A table is here given, abridged from Shull's, of the Number 

 and Standard Deviation of the Bracts, Rays^ and Disk-Florets 

 on four different days between September 2V^ and October S*'^- 



The changes in this short period shew that the difference 

 between local races cannot be insisted on nor multimodality 

 taken to indicate polymorphism without prolonged investigation. 



Attention is drawn to the fact that there is here not a 

 Single case of a many-peaked curve in which the mode coincides 

 with the Fibonacci Series, and that Shull, in criticizing 

 Ludwig's method of forming the „Scheinzipfel" by the over- 

 lapping of curves, points out that such a Schema would furnish 

 an explanation of almost any mode which might arise. 



Karl Pearson. 



Whethehead, Henry, Variation in the Moscatel (Adoxa 

 Moschatelllna). (Biometrika. Vol. II. Part I. 1902. p. 108 



— 113.) 



In this investigation 1071 inflorescences were counted and 

 the number of flowers were found to vary from three to ten, 

 the mode being five. 



A diagram of the frequencies is given, and the arrangement 

 of the petals shewn in a diagram. 



A table gives the total number of flowers per inflorescence 

 and the distribution of the petals in the lateral flowers for three 

 different localities, separately and combined, the general result 

 is that there is a decrease in the frequency and the florets with 

 four petals replace those with five. 



The inflorescence of this Moscatel is found to vary con- 

 siderably from the normal type, consisting of five flowers, one 

 tetramerous and four pentamerous, the Variation from the 

 normal type favouring the tetramerous rather than the pentame- 

 rous type. Karl Pearson. 



Hanausek, T. f.. Zur Entwickelungsgeschichte des 

 Perikarps von Hellanthus annuiis. (Berichte der Deutschen 

 Botanischen Gesellschaft. Band XX. 26. November 1902. 

 Heft 8. Mit Tafel XXI. p. 449—454.) 



